---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '19964'
abstract:
- lang: eng
  text: It has been suggested that giant planet occurrence peaks for stars with M*
    ≈ 3 M⊙ at a value a factor of 4 higher than observed for solar-mass stars. This
    population of giant planets predicted to frequently orbit main-sequence B stars
    at a ≈ 10 au is difficult to characterize during the few hundred million years
    while fusion persists in their host stars. By the time those stars become massive,
    young white dwarfs, any giant planets present would still be luminous as a consequence
    of their recent formation. From an initial sample of 2195 Gaia-identified massive,
    young white dwarfs, we use homogeneous Spitzer Infrared Array Camera (IRAC) photometry
    to search for evidence of unresolved giant planets. For 30 systems, these IRAC
    data provide sensitivity to objects with M ≲ 10 MJup, and we identify one candidate
    with M ≈ 4 MJup orbiting the white dwarf GALEX J071816.4+373139. Correcting for
    the possibility that some of the white dwarfs in our sample result from mergers,
    we find a giant planet occurrence  n GP = 0.11+0.13-0.07 for stars with initial
    masses M* ≳ 3 M⊙. Our occurrence inference is consistent with both the Doppler-inferred
    occurrence of giant planets orbiting M* ≈ 2 M⊙ giant stars and the theoretically
    predicted factor of 4 enhancement in the occurrence of giant planets orbiting
    M* ≈ 3 M⊙ stars relative to solar-mass stars. Future James Webb Space Telescope
    NIRCam observations of our sample would provide sensitivity to Saturn-mass planets
    and thereby a definitive estimate of the occurrence of giant planets orbiting
    stars with M* ≳ 3 M⊙.
acknowledgement: "We thank Jay Farihi, Guangwei Fu, J. J. Hermes, Mary Anne Limbach,
  and Daniel Thorngren for useful discussions. S.C. thanks Siyu Yao for her constant
  inspiration and encouragement. S.C. acknowledges the support of the Martin A. and
  Helen Chooljian Member Fund, funding from the Zurich Insurance Company, and the
  Fund for Natural Sciences at the Institute for Advanced Study. This work has made
  use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia),
  processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/gaia/dpac/consortium).
  Funding for the DPAC has been provided by national institutions, in particular the
  institutions participating in the Gaia Multilateral Agreement. This work is based
  in part on observations made with the Spitzer Space Telescope, which is operated
  by the Jet Propulsion Laboratory, California Institute of Technology under a contract
  with NASA. This publication makes use of data products from the Wide-field Infrared
  Survey Explorer, which is a joint project of the University of California, Los Angeles,
  and the Jet Propulsion Laboratory/California Institute of Technology, funded by
  the National Aeronautics and Space Administration. This research has made use of
  the NASA Exoplanet Archive, which is operated by the California Institute of Technology,
  under contract with the National Aeronautics and Space Administration under the
  Exoplanet Exploration Program. This research has made use of NASA’s Astrophysics
  Data System.\r\nFacilities: ADS - , ESO:VISTA - European Southern Observatory's
  4.1 meter Visible and Infrared Survey Telescope for Astronomy, Exoplanet Archive
  - , Gaia - , IRSA - , NEOWISE - , Spitzer - Spitzer Space Telescope satellite, UKIRT
  - United Kingdom Infrared Telescope, WISE - Wide-field Infrared Survey Explorer.\r\nSoftware:
  astropy (Astropy Collaboration et al. 2013, 2018, 2022), numpy (C. R. Harris et
  al. 2020), matplotlib (J. D. Hunter 2007), R (R Core Team 2024), SciPy (P. Virtanen
  et al. 2020)."
article_number: '47'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Sihao
  full_name: Cheng, Sihao
  last_name: Cheng
- first_name: Kevin C.
  full_name: Schlaufman, Kevin C.
  last_name: Schlaufman
- first_name: Ilaria
  full_name: Caiazzo, Ilaria
  id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d
  last_name: Caiazzo
  orcid: 0000-0002-4770-5388
citation:
  ama: Cheng S, Schlaufman KC, Caiazzo I. A candidate giant planet companion to the
    massive, young White Dwarf GALEX J071816.4+373139 informs the occurrence of giant
    planets orbiting B stars. <i>The Astronomical Journal</i>. 2025;170(1). doi:<a
    href="https://doi.org/10.3847/1538-3881/addd21">10.3847/1538-3881/addd21</a>
  apa: Cheng, S., Schlaufman, K. C., &#38; Caiazzo, I. (2025). A candidate giant planet
    companion to the massive, young White Dwarf GALEX J071816.4+373139 informs the
    occurrence of giant planets orbiting B stars. <i>The Astronomical Journal</i>.
    IOP Publishing. <a href="https://doi.org/10.3847/1538-3881/addd21">https://doi.org/10.3847/1538-3881/addd21</a>
  chicago: Cheng, Sihao, Kevin C. Schlaufman, and Ilaria Caiazzo. “A Candidate Giant
    Planet Companion to the Massive, Young White Dwarf GALEX J071816.4+373139 Informs
    the Occurrence of Giant Planets Orbiting B Stars.” <i>The Astronomical Journal</i>.
    IOP Publishing, 2025. <a href="https://doi.org/10.3847/1538-3881/addd21">https://doi.org/10.3847/1538-3881/addd21</a>.
  ieee: S. Cheng, K. C. Schlaufman, and I. Caiazzo, “A candidate giant planet companion
    to the massive, young White Dwarf GALEX J071816.4+373139 informs the occurrence
    of giant planets orbiting B stars,” <i>The Astronomical Journal</i>, vol. 170,
    no. 1. IOP Publishing, 2025.
  ista: Cheng S, Schlaufman KC, Caiazzo I. 2025. A candidate giant planet companion
    to the massive, young White Dwarf GALEX J071816.4+373139 informs the occurrence
    of giant planets orbiting B stars. The Astronomical Journal. 170(1), 47.
  mla: Cheng, Sihao, et al. “A Candidate Giant Planet Companion to the Massive, Young
    White Dwarf GALEX J071816.4+373139 Informs the Occurrence of Giant Planets Orbiting
    B Stars.” <i>The Astronomical Journal</i>, vol. 170, no. 1, 47, IOP Publishing,
    2025, doi:<a href="https://doi.org/10.3847/1538-3881/addd21">10.3847/1538-3881/addd21</a>.
  short: S. Cheng, K.C. Schlaufman, I. Caiazzo, The Astronomical Journal 170 (2025).
date_created: 2025-07-06T22:01:22Z
date_published: 2025-07-01T00:00:00Z
date_updated: 2026-02-19T09:31:41Z
day: '01'
ddc:
- '520'
department:
- _id: IlCa
doi: 10.3847/1538-3881/addd21
external_id:
  arxiv:
  - '2408.03985'
  isi:
  - '001514518100001'
file:
- access_level: open_access
  checksum: 144b0e46aa3dff0cdf8c6ee7d4fe2fe4
  content_type: application/pdf
  creator: dernst
  date_created: 2025-07-08T06:40:54Z
  date_updated: 2025-07-08T06:40:54Z
  file_id: '19975'
  file_name: 2025_AstronomicalJour_Cheng.pdf
  file_size: 931173
  relation: main_file
  success: 1
file_date_updated: 2025-07-08T06:40:54Z
fulldoi: https://doi.org/10.3847/1538-3881/addd21
has_accepted_license: '1'
intvolume: '       170'
isi: 1
issue: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
publication: The Astronomical Journal
publication_identifier:
  eissn:
  - 1538-3881
  issn:
  - 0004-6256
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: A candidate giant planet companion to the massive, young White Dwarf GALEX
  J071816.4+373139 informs the occurrence of giant planets orbiting B stars
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 170
year: '2025'
...
---
_id: '11604'
abstract:
- lang: eng
  text: The NASA Transiting Exoplanet Survey Satellite (TESS) is observing tens of
    millions of stars with time spans ranging from ∼27 days to about 1 yr of continuous
    observations. This vast amount of data contains a wealth of information for variability,
    exoplanet, and stellar astrophysics studies but requires a number of processing
    steps before it can be fully utilized. In order to efficiently process all the
    TESS data and make it available to the wider scientific community, the TESS Data
    for Asteroseismology working group, as part of the TESS Asteroseismic Science
    Consortium, has created an automated open-source processing pipeline to produce
    light curves corrected for systematics from the short- and long-cadence raw photometry
    data and to classify these according to stellar variability type. We will process
    all stars down to a TESS magnitude of 15. This paper is the next in a series detailing
    how the pipeline works. Here, we present our methodology for the automatic variability
    classification of TESS photometry using an ensemble of supervised learners that
    are combined into a metaclassifier. We successfully validate our method using
    a carefully constructed labeled sample of Kepler Q9 light curves with a 27.4 days
    time span mimicking single-sector TESS observations, on which we obtain an overall
    accuracy of 94.9%. We demonstrate that our methodology can successfully classify
    stars outside of our labeled sample by applying it to all ∼167,000 stars observed
    in Q9 of the Kepler space mission.
acknowledgement: "The research leading to these results has received funding from
  the European Research Council (ERC) under the European Union's Horizon 2020 research
  and innovation program (grant agreement No. 670519: MAMSIE), from the KU Leuven
  Research Council (grant C16/18/005: PARADISE), from the Research Foundation Flanders
  (FWO) under grant agreement G0H5416N (ERC Runner Up Project), as well as from the
  BELgian federal Science Policy Office (BELSPO) through PRODEX grant PLATO. D.J.A
  acknowledges support from the STFC via an Ernest Rutherford Fellowship (ST/R00384X/1).
  Funding for the Stellar Astrophysics Centre is provided by The Danish National Research
  Foundation (grant agreement No.: DNRF106). R.H. and M.N.L. acknowledge the ESA PRODEX
  program. This research was supported by the National Aeronautics and Space Administration
  (80NSSC18K1585 and 80NSSC19K0379) awarded through the TESS Guest Investigator Program.
  K.J.B. is supported by the National Science Foundation under Award AST-1903828.
  J.S.K and K.J.B. were supported by funding from the European Research Council under
  the European Community's Seventh Framework Programme (FP7/2007-2013)/ERC grant agreement
  no. 338251 (StellarAges). D.M.B. gratefully acknowledges funding from a senior postdoctoral
  fellowship from the Research Foundation Flanders (FWO) with grant agreement No.
  1286521N. The research leading to these results has received funding from the Research
  Foundation Flanders (FWO) under grant agreement G0A2917N (BlackGEM). R.A.G. acknowledges
  support from the GOLF and PLATO CNES grants. L.M. was supported by the Premium Postdoctoral
  Research Program of the Hungarian Academy of Sciences. The research leading to these
  results has been supported by the Hungarian National Research, Development, and
  Innovation Office (NKFIH) grant KH_18 130405 and the Lendület LP2014-17 and LP2018-7/2020
  grants of the Hungarian Academy of Sciences. D.B. acknowledges support from the
  NASA TESS Guest Investigator Program under award 80NSSC19K0385.\r\n\r\nThis paper
  includes data collected by the TESS mission, which are publicly available from the
  Mikulski Archive for Space Telescopes (MAST). Funding for the TESS mission is provided
  by NASA's Science Mission directorate. This research has made use of NASA's Astrophysics
  Data System as well as the NASA/IPAC Extragalactic Database (NED) which is operated
  by the Jet Propulsion Laboratory, California Institute of Technology, under contract
  with the National Aeronautics and Space Administration. Funding for the TESS Asteroseismic
  Science Operations Centre is provided by the Danish National Research Foundation
  (Grant agreement no.: DNRF106), ESA PRODEX (PEA 4000119301), and the Stellar Astrophysics
  Centre (SAC) at Aarhus University. We thank the TESS team and staff and TASC/TASOC
  for their support of the present work.\r\n\r\nThis paper includes data collected
  by the Kepler mission. Funding for the Kepler and K2 mission was provided by NASA's
  Science Mission Directorate. The authors acknowledge the efforts of the Kepler Mission
  team in obtaining the light-curve data and data validation products used in this
  publication. These data were generated by the Kepler Mission science pipeline through
  the efforts of the Kepler Science Operations Center and Science Office. The Kepler
  light curves are archived at the Mikulski Archive for Space Telescopes.\r\n\r\nThe
  numerical results presented in this work were obtained at the Centre for Scientific
  Computing, Aarhus. 37 This research made use of Astropy, a community-developed core
  Python package for Astronomy (Astropy Collaboration et al. 2013, 2018).\r\n\r\nSoftware:
  Scikit-learn (Pedregosa et al. 2011), Numpy (Harris et al. 2020), Astropy (Astropy
  Collaboration et al. 2013, 2018), Scipy (Virtanen et al. 2020), Pandas (McKinney
  2010; Pandas Development Team 2020), Lightkurve (Lightkurve Collaboration et al.
  2018), XGBoost (Chen & Guestrin 2016), Tensorflow (Abadi et al. 2015)."
article_number: '209'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: J.
  full_name: Audenaert, J.
  last_name: Audenaert
- first_name: J. S.
  full_name: Kuszlewicz, J. S.
  last_name: Kuszlewicz
- first_name: R.
  full_name: Handberg, R.
  last_name: Handberg
- first_name: A.
  full_name: Tkachenko, A.
  last_name: Tkachenko
- first_name: D. J.
  full_name: Armstrong, D. J.
  last_name: Armstrong
- first_name: M.
  full_name: Hon, M.
  last_name: Hon
- first_name: R.
  full_name: Kgoadi, R.
  last_name: Kgoadi
- first_name: M. N.
  full_name: Lund, M. N.
  last_name: Lund
- first_name: K. J.
  full_name: Bell, K. J.
  last_name: Bell
- first_name: Lisa Annabelle
  full_name: Bugnet, Lisa Annabelle
  id: d9edb345-f866-11ec-9b37-d119b5234501
  last_name: Bugnet
  orcid: 0000-0003-0142-4000
- first_name: D. M.
  full_name: Bowman, D. M.
  last_name: Bowman
- first_name: C.
  full_name: Johnston, C.
  last_name: Johnston
- first_name: R. A.
  full_name: García, R. A.
  last_name: García
- first_name: D.
  full_name: Stello, D.
  last_name: Stello
- first_name: L.
  full_name: Molnár, L.
  last_name: Molnár
- first_name: E.
  full_name: Plachy, E.
  last_name: Plachy
- first_name: D.
  full_name: Buzasi, D.
  last_name: Buzasi
- first_name: C.
  full_name: Aerts, C.
  last_name: Aerts
citation:
  ama: 'Audenaert J, Kuszlewicz JS, Handberg R, et al. TESS Data for Asteroseismology
    (T’DA) stellar variability classification pipeline: Setup and application to the
    Kepler Q9 data. <i>The Astronomical Journal</i>. 2021;162(5). doi:<a href="https://doi.org/10.3847/1538-3881/ac166a">10.3847/1538-3881/ac166a</a>'
  apa: 'Audenaert, J., Kuszlewicz, J. S., Handberg, R., Tkachenko, A., Armstrong,
    D. J., Hon, M., … Aerts, C. (2021). TESS Data for Asteroseismology (T’DA) stellar
    variability classification pipeline: Setup and application to the Kepler Q9 data.
    <i>The Astronomical Journal</i>. IOP Publishing. <a href="https://doi.org/10.3847/1538-3881/ac166a">https://doi.org/10.3847/1538-3881/ac166a</a>'
  chicago: 'Audenaert, J., J. S. Kuszlewicz, R. Handberg, A. Tkachenko, D. J. Armstrong,
    M. Hon, R. Kgoadi, et al. “TESS Data for Asteroseismology (T’DA) Stellar Variability
    Classification Pipeline: Setup and Application to the Kepler Q9 Data.” <i>The
    Astronomical Journal</i>. IOP Publishing, 2021. <a href="https://doi.org/10.3847/1538-3881/ac166a">https://doi.org/10.3847/1538-3881/ac166a</a>.'
  ieee: 'J. Audenaert <i>et al.</i>, “TESS Data for Asteroseismology (T’DA) stellar
    variability classification pipeline: Setup and application to the Kepler Q9 data,”
    <i>The Astronomical Journal</i>, vol. 162, no. 5. IOP Publishing, 2021.'
  ista: 'Audenaert J, Kuszlewicz JS, Handberg R, Tkachenko A, Armstrong DJ, Hon M,
    Kgoadi R, Lund MN, Bell KJ, Bugnet LA, Bowman DM, Johnston C, García RA, Stello
    D, Molnár L, Plachy E, Buzasi D, Aerts C. 2021. TESS Data for Asteroseismology
    (T’DA) stellar variability classification pipeline: Setup and application to the
    Kepler Q9 data. The Astronomical Journal. 162(5), 209.'
  mla: 'Audenaert, J., et al. “TESS Data for Asteroseismology (T’DA) Stellar Variability
    Classification Pipeline: Setup and Application to the Kepler Q9 Data.” <i>The
    Astronomical Journal</i>, vol. 162, no. 5, 209, IOP Publishing, 2021, doi:<a href="https://doi.org/10.3847/1538-3881/ac166a">10.3847/1538-3881/ac166a</a>.'
  short: J. Audenaert, J.S. Kuszlewicz, R. Handberg, A. Tkachenko, D.J. Armstrong,
    M. Hon, R. Kgoadi, M.N. Lund, K.J. Bell, L.A. Bugnet, D.M. Bowman, C. Johnston,
    R.A. García, D. Stello, L. Molnár, E. Plachy, D. Buzasi, C. Aerts, The Astronomical
    Journal 162 (2021).
date_created: 2022-07-18T11:54:55Z
date_published: 2021-10-21T00:00:00Z
date_updated: 2022-08-19T10:01:56Z
day: '21'
doi: 10.3847/1538-3881/ac166a
extern: '1'
external_id:
  arxiv:
  - '2107.06301'
fulldoi: https://doi.org/10.3847/1538-3881/ac166a
intvolume: '       162'
issue: '5'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2107.06301
month: '10'
oa: 1
oa_version: Preprint
publication: The Astronomical Journal
publication_identifier:
  eissn:
  - 1538-3881
  issn:
  - 0004-6256
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'TESS Data for Asteroseismology (T’DA) stellar variability classification pipeline:
  Setup and application to the Kepler Q9 data'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 162
year: '2021'
...
---
_id: '13459'
abstract:
- lang: eng
  text: The B emission-line stars are rapid rotators that were probably spun up by
    mass and angular momentum accretion through mass transfer in an interacting binary.
    Mass transfer will strip the donor star of its envelope to create a small and
    hot subdwarf remnant. Here we report on Hubble Space Telescope/STIS far-ultraviolet
    spectroscopy of a sample of Be stars that reveals the presence of the hot sdO
    companion through the calculation of cross-correlation functions of the observed
    and model spectra. We clearly detect the spectral signature of the sdO star in
    10 of the 13 stars in the sample, and the spectral signals indicate that the sdO
    stars are hot, relatively faint, and slowly rotating as predicted by models. A
    comparison of their temperatures and radii with evolutionary tracks indicates
    that the sdO stars occupy the relatively long-lived, He-core burning stage. Only
    1 of the 10 detections was a known binary prior to this investigation, which emphasizes
    the difficulty of finding such Be+sdO binaries through optical spectroscopy. However,
    these results and others indicate that many Be stars probably host hot subdwarf
    companions.
article_number: '248'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Luqian
  full_name: Wang, Luqian
  last_name: Wang
- first_name: Douglas R.
  full_name: Gies, Douglas R.
  last_name: Gies
- first_name: Geraldine J.
  full_name: Peters, Geraldine J.
  last_name: Peters
- first_name: Ylva Louise Linsdotter
  full_name: Götberg, Ylva Louise Linsdotter
  id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
  last_name: Götberg
  orcid: 0000-0002-6960-6911
- first_name: S. Drew
  full_name: Chojnowski, S. Drew
  last_name: Chojnowski
- first_name: Kathryn V.
  full_name: Lester, Kathryn V.
  last_name: Lester
- first_name: Steve B.
  full_name: Howell, Steve B.
  last_name: Howell
citation:
  ama: Wang L, Gies DR, Peters GJ, et al. The detection and characterization of Be+sdO
    binaries from HST/STIS FUV spectroscopy. <i>The Astronomical Journal</i>. 2021;161(5).
    doi:<a href="https://doi.org/10.3847/1538-3881/abf144">10.3847/1538-3881/abf144</a>
  apa: Wang, L., Gies, D. R., Peters, G. J., Götberg, Y. L. L., Chojnowski, S. D.,
    Lester, K. V., &#38; Howell, S. B. (2021). The detection and characterization
    of Be+sdO binaries from HST/STIS FUV spectroscopy. <i>The Astronomical Journal</i>.
    American Astronomical Society. <a href="https://doi.org/10.3847/1538-3881/abf144">https://doi.org/10.3847/1538-3881/abf144</a>
  chicago: Wang, Luqian, Douglas R. Gies, Geraldine J. Peters, Ylva Louise Linsdotter
    Götberg, S. Drew Chojnowski, Kathryn V. Lester, and Steve B. Howell. “The Detection
    and Characterization of Be+sdO Binaries from HST/STIS FUV Spectroscopy.” <i>The
    Astronomical Journal</i>. American Astronomical Society, 2021. <a href="https://doi.org/10.3847/1538-3881/abf144">https://doi.org/10.3847/1538-3881/abf144</a>.
  ieee: L. Wang <i>et al.</i>, “The detection and characterization of Be+sdO binaries
    from HST/STIS FUV spectroscopy,” <i>The Astronomical Journal</i>, vol. 161, no.
    5. American Astronomical Society, 2021.
  ista: Wang L, Gies DR, Peters GJ, Götberg YLL, Chojnowski SD, Lester KV, Howell
    SB. 2021. The detection and characterization of Be+sdO binaries from HST/STIS
    FUV spectroscopy. The Astronomical Journal. 161(5), 248.
  mla: Wang, Luqian, et al. “The Detection and Characterization of Be+sdO Binaries
    from HST/STIS FUV Spectroscopy.” <i>The Astronomical Journal</i>, vol. 161, no.
    5, 248, American Astronomical Society, 2021, doi:<a href="https://doi.org/10.3847/1538-3881/abf144">10.3847/1538-3881/abf144</a>.
  short: L. Wang, D.R. Gies, G.J. Peters, Y.L.L. Götberg, S.D. Chojnowski, K.V. Lester,
    S.B. Howell, The Astronomical Journal 161 (2021).
date_created: 2023-08-03T10:11:57Z
date_published: 2021-05-04T00:00:00Z
date_updated: 2023-08-21T11:35:50Z
day: '04'
doi: 10.3847/1538-3881/abf144
extern: '1'
external_id:
  arxiv:
  - '2103.13642'
fulldoi: https://doi.org/10.3847/1538-3881/abf144
intvolume: '       161'
issue: '5'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2103.13642
month: '05'
oa: 1
oa_version: Preprint
publication: The Astronomical Journal
publication_identifier:
  eissn:
  - 1538-3881
  issn:
  - 0004-6256
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: The detection and characterization of Be+sdO binaries from HST/STIS FUV spectroscopy
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 161
year: '2021'
...
---
_id: '15216'
abstract:
- lang: eng
  text: AM CVn systems are a rare type of accreting binary that consists of a white
    dwarf and a helium-rich, degenerate donor star. Using the Zwicky Transient Facility
    (ZTF), we searched for new AM CVn systems by focusing on blue, outbursting stars.
    We first selected outbursting stars using the ZTF alerts. We cross matched the
    candidates with Gaia and Pan-STARRS catalogs. The initial selection of candidates
    based on the Gaia BP-RP contains 1751 unknown objects. We used the Pan-STARRS
    g-r and r-i color in combination with the Gaia color to identify 59 strong AM
    CVn candidates. We obtained identification spectra of 35 sources, of which 18
    are high-priority candidates, and discovered nine new AM CVn systems and one magnetic
    CV that shows only He-ii lines. Using the outburst recurrence time, we estimate
    the orbital periods of the nine new AM CVn systems that are in the range of 29–50
    minutes. We conclude that targeted follow up of blue, outbursting sources is an
    efficient method to find new AM CVn systems and we plan to follow up all candidates
    we identified to systematically study the population of outbursting AM CVn systems.
article_number: '113'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jan
  full_name: van Roestel, Jan
  last_name: van Roestel
- first_name: Leah
  full_name: Creter, Leah
  last_name: Creter
- first_name: Thomas
  full_name: Kupfer, Thomas
  last_name: Kupfer
- first_name: Paula
  full_name: Szkody, Paula
  last_name: Szkody
- first_name: Jim
  full_name: Fuller, Jim
  last_name: Fuller
- first_name: Matthew J.
  full_name: Green, Matthew J.
  last_name: Green
- first_name: R. Michael
  full_name: Rich, R. Michael
  last_name: Rich
- first_name: John
  full_name: Sepikas, John
  last_name: Sepikas
- first_name: Kevin
  full_name: Burdge, Kevin
  last_name: Burdge
- first_name: Ilaria
  full_name: Caiazzo, Ilaria
  id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d
  last_name: Caiazzo
  orcid: 0000-0002-4770-5388
- first_name: Przemek
  full_name: Mróz, Przemek
  last_name: Mróz
- first_name: Thomas A.
  full_name: Prince, Thomas A.
  last_name: Prince
- first_name: Dmitry A.
  full_name: Duev, Dmitry A.
  last_name: Duev
- first_name: Matthew J.
  full_name: Graham, Matthew J.
  last_name: Graham
- first_name: David L.
  full_name: Shupe, David L.
  last_name: Shupe
- first_name: Russ R.
  full_name: Laher, Russ R.
  last_name: Laher
- first_name: Ashish A.
  full_name: Mahabal, Ashish A.
  last_name: Mahabal
- first_name: Frank J.
  full_name: Masci, Frank J.
  last_name: Masci
citation:
  ama: van Roestel J, Creter L, Kupfer T, et al. A systematic search for outbursting
    AM CVn systems with the Zwicky transient facility. <i>The Astronomical Journal</i>.
    2021;162(3). doi:<a href="https://doi.org/10.3847/1538-3881/ac0622">10.3847/1538-3881/ac0622</a>
  apa: van Roestel, J., Creter, L., Kupfer, T., Szkody, P., Fuller, J., Green, M.
    J., … Masci, F. J. (2021). A systematic search for outbursting AM CVn systems
    with the Zwicky transient facility. <i>The Astronomical Journal</i>. American
    Astronomical Society. <a href="https://doi.org/10.3847/1538-3881/ac0622">https://doi.org/10.3847/1538-3881/ac0622</a>
  chicago: Roestel, Jan van, Leah Creter, Thomas Kupfer, Paula Szkody, Jim Fuller,
    Matthew J. Green, R. Michael Rich, et al. “A Systematic Search for Outbursting
    AM CVn Systems with the Zwicky Transient Facility.” <i>The Astronomical Journal</i>.
    American Astronomical Society, 2021. <a href="https://doi.org/10.3847/1538-3881/ac0622">https://doi.org/10.3847/1538-3881/ac0622</a>.
  ieee: J. van Roestel <i>et al.</i>, “A systematic search for outbursting AM CVn
    systems with the Zwicky transient facility,” <i>The Astronomical Journal</i>,
    vol. 162, no. 3. American Astronomical Society, 2021.
  ista: van Roestel J, Creter L, Kupfer T, Szkody P, Fuller J, Green MJ, Rich RM,
    Sepikas J, Burdge K, Caiazzo I, Mróz P, Prince TA, Duev DA, Graham MJ, Shupe DL,
    Laher RR, Mahabal AA, Masci FJ. 2021. A systematic search for outbursting AM CVn
    systems with the Zwicky transient facility. The Astronomical Journal. 162(3),
    113.
  mla: van Roestel, Jan, et al. “A Systematic Search for Outbursting AM CVn Systems
    with the Zwicky Transient Facility.” <i>The Astronomical Journal</i>, vol. 162,
    no. 3, 113, American Astronomical Society, 2021, doi:<a href="https://doi.org/10.3847/1538-3881/ac0622">10.3847/1538-3881/ac0622</a>.
  short: J. van Roestel, L. Creter, T. Kupfer, P. Szkody, J. Fuller, M.J. Green, R.M.
    Rich, J. Sepikas, K. Burdge, I. Caiazzo, P. Mróz, T.A. Prince, D.A. Duev, M.J.
    Graham, D.L. Shupe, R.R. Laher, A.A. Mahabal, F.J. Masci, The Astronomical Journal
    162 (2021).
date_created: 2024-03-26T10:32:25Z
date_published: 2021-08-19T00:00:00Z
date_updated: 2024-04-02T07:28:50Z
day: '19'
doi: 10.3847/1538-3881/ac0622
extern: '1'
external_id:
  arxiv:
  - '2105.02261'
fulldoi: https://doi.org/10.3847/1538-3881/ac0622
intvolume: '       162'
issue: '3'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2105.02261
month: '08'
oa: 1
oa_version: Preprint
publication: The Astronomical Journal
publication_identifier:
  eissn:
  - 1538-3881
  issn:
  - 0004-6256
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A systematic search for outbursting AM CVn systems with the Zwicky transient
  facility
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 162
year: '2021'
...
---
OA_type: free access
_id: '17799'
abstract:
- lang: eng
  text: The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey
    that will eventually cover approximately one-quarter of the celestial sphere and
    collect spectra of ≈106 galaxies, 100,000 quasars, 30,000 stars, and 30,000 serendipity
    targets. In 2001 June, the SDSS released to the general astronomical community
    its early data release, roughly 462 deg2 of imaging data including almost 14 million
    detected objects and 54,008 follow-up spectra. The imaging data were collected
    in drift-scan mode in five bandpasses (u, g, r, i, and z); our 95% completeness
    limits for stars are 22.0, 22.2, 22.2, 21.3, and 20.5, respectively. The photometric
    calibration is reproducible to 5%, 3%, 3%, 3%, and 5%, respectively. The spectra
    are flux- and wavelength-calibrated, with 4096 pixels from 3800 to 9200 Å at R
    ≈ 1800. We present the means by which these data are distributed to the astronomical
    community, descriptions of the hardware used to obtain the data, the software
    used for processing the data, the measured quantities for each observed object,
    and an overview of the properties of this data set.
article_processing_charge: No
article_type: original
author:
- first_name: Chris
  full_name: Stoughton, Chris
  last_name: Stoughton
- first_name: Robert H.
  full_name: Lupton, Robert H.
  last_name: Lupton
- first_name: Mariangela
  full_name: Bernardi, Mariangela
  last_name: Bernardi
- first_name: Michael R.
  full_name: Blanton, Michael R.
  last_name: Blanton
- first_name: Scott
  full_name: Burles, Scott
  last_name: Burles
- first_name: Francisco J.
  full_name: Castander, Francisco J.
  last_name: Castander
- first_name: A. J.
  full_name: Connolly, A. J.
  last_name: Connolly
- first_name: Daniel J.
  full_name: Eisenstein, Daniel J.
  last_name: Eisenstein
- first_name: Joshua A.
  full_name: Frieman, Joshua A.
  last_name: Frieman
- first_name: G. S.
  full_name: Hennessy, G. S.
  last_name: Hennessy
- first_name: Robert B.
  full_name: Hindsley, Robert B.
  last_name: Hindsley
- first_name: Željko
  full_name: Ivezić, Željko
  last_name: Ivezić
- first_name: Stephen
  full_name: Kent, Stephen
  last_name: Kent
- first_name: Peter Z.
  full_name: Kunszt, Peter Z.
  last_name: Kunszt
- first_name: Brian C.
  full_name: Lee, Brian C.
  last_name: Lee
- first_name: Avery
  full_name: Meiksin, Avery
  last_name: Meiksin
- first_name: Jeffrey A.
  full_name: Munn, Jeffrey A.
  last_name: Munn
- first_name: Heidi Jo
  full_name: Newberg, Heidi Jo
  last_name: Newberg
- first_name: R. C.
  full_name: Nichol, R. C.
  last_name: Nichol
- first_name: Tom
  full_name: Nicinski, Tom
  last_name: Nicinski
- first_name: Jeffrey R.
  full_name: Pier, Jeffrey R.
  last_name: Pier
- first_name: Gordon T.
  full_name: Richards, Gordon T.
  last_name: Richards
- first_name: Michael W.
  full_name: Richmond, Michael W.
  last_name: Richmond
- first_name: David J.
  full_name: Schlegel, David J.
  last_name: Schlegel
- first_name: J. Allyn
  full_name: Smith, J. Allyn
  last_name: Smith
- first_name: Michael A.
  full_name: Strauss, Michael A.
  last_name: Strauss
- first_name: Mark
  full_name: SubbaRao, Mark
  last_name: SubbaRao
- first_name: Alexander S.
  full_name: Szalay, Alexander S.
  last_name: Szalay
- first_name: Aniruddha R.
  full_name: Thakar, Aniruddha R.
  last_name: Thakar
- first_name: Douglas L.
  full_name: Tucker, Douglas L.
  last_name: Tucker
- first_name: Daniel E.
  full_name: Vanden Berk, Daniel E.
  last_name: Vanden Berk
- first_name: Brian
  full_name: Yanny, Brian
  last_name: Yanny
- first_name: Jennifer K.
  full_name: Adelman, Jennifer K.
  last_name: Adelman
- first_name: John E.
  full_name: Anderson, Jr., John E.
  last_name: Anderson, Jr.
- first_name: Scott F.
  full_name: Anderson, Scott F.
  last_name: Anderson
- first_name: James
  full_name: Annis, James
  last_name: Annis
- first_name: Neta A.
  full_name: Bahcall, Neta A.
  last_name: Bahcall
- first_name: J. A.
  full_name: Bakken, J. A.
  last_name: Bakken
- first_name: Matthias
  full_name: Bartelmann, Matthias
  last_name: Bartelmann
- first_name: Steven
  full_name: Bastian, Steven
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  last_name: Bauer
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  full_name: Böhringer, Hans
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- first_name: William N.
  full_name: Boroski, William N.
  last_name: Boroski
- first_name: Steve
  full_name: Bracker, Steve
  last_name: Bracker
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  full_name: Briegel, Charlie
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  full_name: Briggs, John W.
  last_name: Briggs
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  full_name: Brinkmann, J.
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  full_name: Brunner, Robert
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  full_name: Carey, Larry
  last_name: Carey
- first_name: Michael A.
  full_name: Carr, Michael A.
  last_name: Carr
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  full_name: Chen, Bing
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  full_name: Christian, Damian
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  full_name: Colestock, Patrick L.
  last_name: Colestock
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  full_name: Crocker, J. H.
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- first_name: István
  full_name: Csabai, István
  last_name: Csabai
- first_name: Paul C.
  full_name: Czarapata, Paul C.
  last_name: Czarapata
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  full_name: Dalcanton, Julianne
  last_name: Dalcanton
- first_name: Arthur F.
  full_name: Davidsen, Arthur F.
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- first_name: John Eric
  full_name: Davis, John Eric
  last_name: Davis
- first_name: Walter
  full_name: Dehnen, Walter
  last_name: Dehnen
- first_name: Scott
  full_name: Dodelson, Scott
  last_name: Dodelson
- first_name: Mamoru
  full_name: Doi, Mamoru
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- first_name: Tom
  full_name: Dombeck, Tom
  last_name: Dombeck
- first_name: Megan
  full_name: Donahue, Megan
  last_name: Donahue
- first_name: Nancy
  full_name: Ellman, Nancy
  last_name: Ellman
- first_name: Brian R.
  full_name: Elms, Brian R.
  last_name: Elms
- first_name: Michael L.
  full_name: Evans, Michael L.
  last_name: Evans
- first_name: Laurent
  full_name: Eyer, Laurent
  last_name: Eyer
- first_name: Xiaohui
  full_name: Fan, Xiaohui
  last_name: Fan
- first_name: Glenn R.
  full_name: Federwitz, Glenn R.
  last_name: Federwitz
- first_name: Scott
  full_name: Friedman, Scott
  last_name: Friedman
- first_name: Masataka
  full_name: Fukugita, Masataka
  last_name: Fukugita
- first_name: Roy
  full_name: Gal, Roy
  last_name: Gal
- first_name: Bruce
  full_name: Gillespie, Bruce
  last_name: Gillespie
- first_name: Karl
  full_name: Glazebrook, Karl
  last_name: Glazebrook
- first_name: Jim
  full_name: Gray, Jim
  last_name: Gray
- first_name: Eva K.
  full_name: Grebel, Eva K.
  last_name: Grebel
- first_name: Bruce
  full_name: Greenawalt, Bruce
  last_name: Greenawalt
- first_name: Gretchen
  full_name: Greene, Gretchen
  last_name: Greene
- first_name: James E.
  full_name: Gunn, James E.
  last_name: Gunn
- first_name: Ernst
  full_name: de Haas, Ernst
  last_name: de Haas
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Merle
  full_name: Haldeman, Merle
  last_name: Haldeman
- first_name: Patrick B.
  full_name: Hall, Patrick B.
  last_name: Hall
- first_name: Masaru
  full_name: Hamabe, Masaru
  last_name: Hamabe
- first_name: Brad
  full_name: Hansen, Brad
  last_name: Hansen
- first_name: Frederick H.
  full_name: Harris, Frederick H.
  last_name: Harris
- first_name: Hugh
  full_name: Harris, Hugh
  last_name: Harris
- first_name: Michael
  full_name: Harvanek, Michael
  last_name: Harvanek
- first_name: Suzanne L.
  full_name: Hawley, Suzanne L.
  last_name: Hawley
- first_name: J. J. E.
  full_name: Hayes, J. J. E.
  last_name: Hayes
- first_name: Timothy M.
  full_name: Heckman, Timothy M.
  last_name: Heckman
- first_name: Amina
  full_name: Helmi, Amina
  last_name: Helmi
- first_name: Arne
  full_name: Henden, Arne
  last_name: Henden
- first_name: Craig J.
  full_name: Hogan, Craig J.
  last_name: Hogan
- first_name: David W.
  full_name: Hogg, David W.
  last_name: Hogg
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  full_name: Holmgren, Donald J.
  last_name: Holmgren
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  full_name: Holtzman, Jon
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  full_name: Johnston, David E.
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- first_name: Mark
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- first_name: David H.
  full_name: Weinberg, David H.
  last_name: Weinberg
- first_name: Richard L.
  full_name: White, Richard L.
  last_name: White
- first_name: Simon D. M.
  full_name: White, Simon D. M.
  last_name: White
- first_name: Brian
  full_name: Wilhite, Brian
  last_name: Wilhite
- first_name: David
  full_name: Wolfe, David
  last_name: Wolfe
- first_name: Naoki
  full_name: Yasuda, Naoki
  last_name: Yasuda
- first_name: Donald G.
  full_name: York, Donald G.
  last_name: York
- first_name: Idit
  full_name: Zehavi, Idit
  last_name: Zehavi
- first_name: Wei
  full_name: Zheng, Wei
  last_name: Zheng
citation:
  ama: 'Stoughton C, Lupton RH, Bernardi M, et al. Sloan digital sky survey: Early
    data release. <i>The Astronomical Journal</i>. 2002;123(1):485-548. doi:<a href="https://doi.org/10.1086/324741">10.1086/324741</a>'
  apa: 'Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S., Castander,
    F. J., … Zheng, W. (2002). Sloan digital sky survey: Early data release. <i>The
    Astronomical Journal</i>. American Astronomical Society. <a href="https://doi.org/10.1086/324741">https://doi.org/10.1086/324741</a>'
  chicago: 'Stoughton, Chris, Robert H. Lupton, Mariangela Bernardi, Michael R. Blanton,
    Scott Burles, Francisco J. Castander, A. J. Connolly, et al. “Sloan Digital Sky
    Survey: Early Data Release.” <i>The Astronomical Journal</i>. American Astronomical
    Society, 2002. <a href="https://doi.org/10.1086/324741">https://doi.org/10.1086/324741</a>.'
  ieee: 'C. Stoughton <i>et al.</i>, “Sloan digital sky survey: Early data release,”
    <i>The Astronomical Journal</i>, vol. 123, no. 1. American Astronomical Society,
    pp. 485–548, 2002.'
  ista: 'Stoughton C et al. 2002. Sloan digital sky survey: Early data release. The
    Astronomical Journal. 123(1), 485–548.'
  mla: 'Stoughton, Chris, et al. “Sloan Digital Sky Survey: Early Data Release.” <i>The
    Astronomical Journal</i>, vol. 123, no. 1, American Astronomical Society, 2002,
    pp. 485–548, doi:<a href="https://doi.org/10.1086/324741">10.1086/324741</a>.'
  short: C. Stoughton, R.H. Lupton, M. Bernardi, M.R. Blanton, S. Burles, F.J. Castander,
    A.J. Connolly, D.J. Eisenstein, J.A. Frieman, G.S. Hennessy, R.B. Hindsley, Ž.
    Ivezić, S. Kent, P.Z. Kunszt, B.C. Lee, A. Meiksin, J.A. Munn, H.J. Newberg, R.C.
    Nichol, T. Nicinski, J.R. Pier, G.T. Richards, M.W. Richmond, D.J. Schlegel, J.A.
    Smith, M.A. Strauss, M. SubbaRao, A.S. Szalay, A.R. Thakar, D.L. Tucker, D.E.
    Vanden Berk, B. Yanny, J.K. Adelman, J.E. Anderson, Jr., S.F. Anderson, J. Annis,
    N.A. Bahcall, J.A. Bakken, M. Bartelmann, S. Bastian, A. Bauer, E. Berman, H.
    Böhringer, W.N. Boroski, S. Bracker, C. Briegel, J.W. Briggs, J. Brinkmann, R.
    Brunner, L. Carey, M.A. Carr, B. Chen, D. Christian, P.L. Colestock, J.H. Crocker,
    I. Csabai, P.C. Czarapata, J. Dalcanton, A.F. Davidsen, J.E. Davis, W. Dehnen,
    S. Dodelson, M. Doi, T. Dombeck, M. Donahue, N. Ellman, B.R. Elms, M.L. Evans,
    L. Eyer, X. Fan, G.R. Federwitz, S. Friedman, M. Fukugita, R. Gal, B. Gillespie,
    K. Glazebrook, J. Gray, E.K. Grebel, B. Greenawalt, G. Greene, J.E. Gunn, E. de
    Haas, Z. Haiman, M. Haldeman, P.B. Hall, M. Hamabe, B. Hansen, F.H. Harris, H.
    Harris, M. Harvanek, S.L. Hawley, J.J.E. Hayes, T.M. Heckman, A. Helmi, A. Henden,
    C.J. Hogan, D.W. Hogg, D.J. Holmgren, J. Holtzman, C.-H. Huang, C. Hull, S.-I.
    Ichikawa, T. Ichikawa, D.E. Johnston, G. Kauffmann, R.S.J. Kim, T. Kimball, E.
    Kinney, M. Klaene, S.J. Kleinman, A. Klypin, G.R. Knapp, J. Korienek, J. Krolik,
    R.G. Kron, J. Krzesiński, D.Q. Lamb, R.F. Leger, S. Limmongkol, C. Lindenmeyer,
    D.C. Long, C. Loomis, J. Loveday, B. MacKinnon, E.J. Mannery, P.M. Mantsch, B.
    Margon, P. McGehee, T.A. McKay, B. McLean, K. Menou, A. Merelli, H.J. Mo, D.G.
    Monet, O. Nakamura, V.K. Narayanan, T. Nash, E.H. Neilsen, Jr., P.R. Newman, A.
    Nitta, M. Odenkirchen, N. Okada, S. Okamura, J.P. Ostriker, R. Owen, A.G. Pauls,
    J. Peoples, R.S. Peterson, D. Petravick, A. Pope, R. Pordes, M. Postman, A. Prosapio,
    T.R. Quinn, R. Rechenmacher, C.H. Rivetta, H.-W. Rix, C.M. Rockosi, R. Rosner,
    K. Ruthmansdorfer, D. Sandford, D.P. Schneider, R. Scranton, M. Sekiguchi, G.
    Sergey, R. Sheth, K. Shimasaku, S. Smee, S.A. Snedden, A. Stebbins, C. Stubbs,
    I. Szapudi, P. Szkody, G.P. Szokoly, S. Tabachnik, Z. Tsvetanov, A. Uomoto, M.S.
    Vogeley, W. Voges, P. Waddell, R. Walterbos, S. Wang, M. Watanabe, D.H. Weinberg,
    R.L. White, S.D.M. White, B. Wilhite, D. Wolfe, N. Yasuda, D.G. York, I. Zehavi,
    W. Zheng, The Astronomical Journal 123 (2002) 485–548.
date_created: 2024-09-06T10:32:06Z
date_published: 2002-01-01T00:00:00Z
date_updated: 2024-11-12T09:51:31Z
day: '01'
doi: 10.1086/324741
extern: '1'
fulldoi: https://doi.org/10.1086/324741
intvolume: '       123'
issue: '1'
language:
- iso: eng
month: '01'
oa_version: None
page: 485-548
publication: The Astronomical Journal
publication_identifier:
  eissn:
  - 1538-3881
  issn:
  - 0004-6256
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
related_material:
  link:
  - relation: erratum
    url: https://doi.org/10.1086/340314
scopus_import: '1'
status: public
title: 'Sloan digital sky survey: Early data release'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 123
year: '2002'
...
