[{"date_updated":"2022-08-22T07:04:45Z","oa":1,"extern":"1","oa_version":"Preprint","date_created":"2022-07-18T13:27:26Z","citation":{"chicago":"Zinn, Joel C., Dennis Stello, Yvonne Elsworth, Rafael A. García, Thomas Kallinger, Savita Mathur, Benoît Mosser, et al. “The K2 Galactic Archaeology Program Data Release 2: Asteroseismic Results from Campaigns 4, 6, and 7.” <i>The Astrophysical Journal Supplement Series</i>. IOP Publishing, 2020. <a href=\"https://doi.org/10.3847/1538-4365/abbee3\">https://doi.org/10.3847/1538-4365/abbee3</a>.","apa":"Zinn, J. C., Stello, D., Elsworth, Y., García, R. A., Kallinger, T., Mathur, S., … Miglio, A. (2020). The K2 galactic archaeology program data release 2: Asteroseismic results from campaigns 4, 6, and 7. <i>The Astrophysical Journal Supplement Series</i>. IOP Publishing. <a href=\"https://doi.org/10.3847/1538-4365/abbee3\">https://doi.org/10.3847/1538-4365/abbee3</a>","ista":"Zinn JC, Stello D, Elsworth Y, García RA, Kallinger T, Mathur S, Mosser B, Bugnet LA, Jones C, Hon M, Sharma S, Schönrich R, Warfield JT, Luger R, Pinsonneault MH, Johnson JA, Huber D, Aguirre VS, Chaplin WJ, Davies GR, Miglio A. 2020. The K2 galactic archaeology program data release 2: Asteroseismic results from campaigns 4, 6, and 7. The Astrophysical Journal Supplement Series. 251(2), 23.","ama":"Zinn JC, Stello D, Elsworth Y, et al. The K2 galactic archaeology program data release 2: Asteroseismic results from campaigns 4, 6, and 7. <i>The Astrophysical Journal Supplement Series</i>. 2020;251(2). doi:<a href=\"https://doi.org/10.3847/1538-4365/abbee3\">10.3847/1538-4365/abbee3</a>","ieee":"J. C. Zinn <i>et al.</i>, “The K2 galactic archaeology program data release 2: Asteroseismic results from campaigns 4, 6, and 7,” <i>The Astrophysical Journal Supplement Series</i>, vol. 251, no. 2. IOP Publishing, 2020.","mla":"Zinn, Joel C., et al. “The K2 Galactic Archaeology Program Data Release 2: Asteroseismic Results from Campaigns 4, 6, and 7.” <i>The Astrophysical Journal Supplement Series</i>, vol. 251, no. 2, 23, IOP Publishing, 2020, doi:<a href=\"https://doi.org/10.3847/1538-4365/abbee3\">10.3847/1538-4365/abbee3</a>.","short":"J.C. Zinn, D. Stello, Y. Elsworth, R.A. García, T. Kallinger, S. Mathur, B. Mosser, L.A. Bugnet, C. Jones, M. Hon, S. Sharma, R. Schönrich, J.T. Warfield, R. Luger, M.H. Pinsonneault, J.A. Johnson, D. Huber, V.S. Aguirre, W.J. Chaplin, G.R. Davies, A. Miglio, The Astrophysical Journal Supplement Series 251 (2020)."},"intvolume":"       251","publication":"The Astrophysical Journal Supplement Series","publisher":"IOP Publishing","publication_identifier":{"eissn":["1538-4365"],"issn":["0067-0049"]},"volume":251,"article_type":"original","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2012.04051"}],"type":"journal_article","abstract":[{"lang":"eng","text":"Studies of Galactic structure and evolution have benefited enormously from Gaia kinematic information, though additional, intrinsic stellar parameters like age are required to best constrain Galactic models. Asteroseismology is the most precise method of providing such information for field star populations en masse, but existing samples for the most part have been limited to a few narrow fields of view by the CoRoT and Kepler missions. In an effort to provide well-characterized stellar parameters across a wide range in Galactic position, we present the second data release of red giant asteroseismic parameters for the K2 Galactic Archaeology Program (GAP). We provide ${\\nu }_{\\max }$ and ${\\rm{\\Delta }}\\nu $ based on six independent pipeline analyses; first-ascent red giant branch (RGB) and red clump (RC) evolutionary state classifications from machine learning; and ready-to-use radius and mass coefficients, κR and κM, which, when appropriately multiplied by a solar-scaled effective temperature factor, yield physical stellar radii and masses. In total, we report 4395 radius and mass coefficients, with typical uncertainties of 3.3% (stat.) ± 1% (syst.) for κR and 7.7% (stat.) ± 2% (syst.) for κM among RGB stars, and 5.0% (stat.) ± 1% (syst.) for κR and 10.5% (stat.) ± 2% (syst.) for κM among RC stars. We verify that the sample is nearly complete—except for a dearth of stars with ${\\nu }_{\\max }\\lesssim 10\\mbox{--}20\\,\\mu \\mathrm{Hz}$—by comparing to Galactic models and visual inspection. Our asteroseismic radii agree with radii derived from Gaia Data Release 2 parallaxes to within 2.2% ± 0.3% for RGB stars and 2.0% ± 0.6% for RC stars."}],"_id":"11610","month":"12","language":[{"iso":"eng"}],"external_id":{"arxiv":["2012.04051"]},"article_number":"23","status":"public","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"acknowledgement":"We thank the referee for comments that strengthened the manuscript. J. C. Z. and M. H. P. acknowledge support from NASA grants 80NSSC18K0391 and NNX17AJ40G. Y. E. and C. J. acknowledge the support of the UK Science and Technology Facilities Council (STFC). S. M. would like to acknowledge support from the Spanish Ministry with the Ramon y Cajal fellowship number RYC-2015-17697. R. A. G. acknowledges funding received from the PLATO CNES grant. R. S. acknowledges funding via a Royal Society University Research Fellowship. D.H. acknowledges support from the Alfred P. Sloan Foundation and the National Aeronautics and Space Administration (80NSSC19K0108). V.S.A. acknowledges support from the Independent Research Fund Denmark (Research grant 7027-00096B), and the Carlsberg foundation (grant agreement CF19-0649). This research was supported in part by the National Science Foundation under grant No. NSF PHY-1748958.\r\n\r\nFunding for the Stellar Astrophysics Centre (SAC) is provided by The Danish National Research Foundation (grant agreement No. DNRF106).\r\n\r\nThe K2 Galactic Archaeology Program is supported by the National Aeronautics and Space Administration under grant NNX16AJ17G issued through the K2 Guest Observer Program.\r\n\r\nThis publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.\r\n\r\nThis 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.\r\n\r\nFunding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High Performance Computing at the University of Utah. The SDSS website is www.sdss.org.\r\n\r\nSDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration, including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, the Chilean Participation Group, the French Participation Group, the Harvard–Smithsonian Center for Astrophysics, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatário Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.\r\n\r\nSoftware: asfgrid (Sharma & Stello 2016), emcee (Foreman-Mackey et al. 2013), NumPy (Walt 2011), pandas (McKinney 2010; Reback et al. 2020), Matplotlib (Hunter 2007), IPython (Pérez & Granger 2007), SciPy (Virtanen et al. 2020).","issue":"2","scopus_import":"1","publication_status":"published","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","year":"2020","date_published":"2020-12-01T00:00:00Z","author":[{"full_name":"Zinn, Joel C.","first_name":"Joel C.","last_name":"Zinn"},{"last_name":"Stello","full_name":"Stello, Dennis","first_name":"Dennis"},{"last_name":"Elsworth","first_name":"Yvonne","full_name":"Elsworth, Yvonne"},{"last_name":"García","full_name":"García, Rafael A.","first_name":"Rafael A."},{"first_name":"Thomas","full_name":"Kallinger, Thomas","last_name":"Kallinger"},{"full_name":"Mathur, Savita","first_name":"Savita","last_name":"Mathur"},{"first_name":"Benoît","full_name":"Mosser, Benoît","last_name":"Mosser"},{"id":"d9edb345-f866-11ec-9b37-d119b5234501","orcid":"0000-0003-0142-4000","last_name":"Bugnet","full_name":"Bugnet, Lisa Annabelle","first_name":"Lisa Annabelle"},{"first_name":"Caitlin","full_name":"Jones, Caitlin","last_name":"Jones"},{"first_name":"Marc","full_name":"Hon, Marc","last_name":"Hon"},{"first_name":"Sanjib","full_name":"Sharma, Sanjib","last_name":"Sharma"},{"last_name":"Schönrich","first_name":"Ralph","full_name":"Schönrich, Ralph"},{"first_name":"Jack T.","full_name":"Warfield, Jack T.","last_name":"Warfield"},{"last_name":"Luger","full_name":"Luger, Rodrigo","first_name":"Rodrigo"},{"full_name":"Pinsonneault, Marc H.","first_name":"Marc H.","last_name":"Pinsonneault"},{"last_name":"Johnson","first_name":"Jennifer A.","full_name":"Johnson, Jennifer A."},{"first_name":"Daniel","full_name":"Huber, Daniel","last_name":"Huber"},{"last_name":"Aguirre","full_name":"Aguirre, Victor Silva","first_name":"Victor Silva"},{"last_name":"Chaplin","first_name":"William J.","full_name":"Chaplin, William J."},{"first_name":"Guy R.","full_name":"Davies, Guy R.","last_name":"Davies"},{"full_name":"Miglio, Andrea","first_name":"Andrea","last_name":"Miglio"}],"day":"01","article_processing_charge":"No","arxiv":1,"quality_controlled":"1","doi":"10.3847/1538-4365/abbee3","title":"The K2 galactic archaeology program data release 2: Asteroseismic results from campaigns 4, 6, and 7"},{"year":"2002","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","arxiv":1,"article_processing_charge":"No","day":"01","author":[{"last_name":"Hall","first_name":"Patrick B.","full_name":"Hall, Patrick B."},{"last_name":"Anderson","first_name":"Scott F.","full_name":"Anderson, Scott F."},{"first_name":"Michael A.","full_name":"Strauss, Michael A.","last_name":"Strauss"},{"last_name":"York","first_name":"Donald G.","full_name":"York, Donald G."},{"last_name":"Richards","first_name":"Gordon T.","full_name":"Richards, Gordon T."},{"last_name":"Fan","first_name":"Xiaohui","full_name":"Fan, Xiaohui"},{"last_name":"Knapp","full_name":"Knapp, G. R.","first_name":"G. R."},{"first_name":"Donald P.","full_name":"Schneider, Donald P.","last_name":"Schneider"},{"last_name":"Vanden Berk","full_name":"Vanden Berk, Daniel E.","first_name":"Daniel E."},{"last_name":"Geballe","first_name":"T. R.","full_name":"Geballe, T. R."},{"last_name":"Bauer","full_name":"Bauer, Amanda E.","first_name":"Amanda E."},{"last_name":"Becker","first_name":"Robert H.","full_name":"Becker, Robert H."},{"last_name":"Davis","first_name":"Marc","full_name":"Davis, Marc"},{"last_name":"Rix","full_name":"Rix, Hans‐Walter","first_name":"Hans‐Walter"},{"first_name":"R. C.","full_name":"Nichol, R. C.","last_name":"Nichol"},{"full_name":"Bahcall, Neta A.","first_name":"Neta A.","last_name":"Bahcall"},{"full_name":"Brinkmann, J.","first_name":"J.","last_name":"Brinkmann"},{"first_name":"Robert","full_name":"Brunner, Robert","last_name":"Brunner"},{"last_name":"Connolly","first_name":"A. J.","full_name":"Connolly, A. J."},{"first_name":"Istvan","full_name":"Csabai, Istvan","last_name":"Csabai"},{"first_name":"Mamoru","full_name":"Doi, Mamoru","last_name":"Doi"},{"last_name":"Fukugita","full_name":"Fukugita, Masataka","first_name":"Masataka"},{"first_name":"James E.","full_name":"Gunn, James E.","last_name":"Gunn"},{"last_name":"Haiman","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","orcid":"0000-0003-3633-5403","first_name":"Zoltán","full_name":"Haiman, Zoltán"},{"last_name":"Harvanek","full_name":"Harvanek, Michael","first_name":"Michael"},{"full_name":"Heckman, Timothy M.","first_name":"Timothy M.","last_name":"Heckman"},{"last_name":"Hennessy","full_name":"Hennessy, G. S.","first_name":"G. S."},{"full_name":"Inada, Naohisa","first_name":"Naohisa","last_name":"Inada"},{"last_name":"Ivezić","full_name":"Ivezić, Željko","first_name":"Željko"},{"full_name":"Johnston, David","first_name":"David","last_name":"Johnston"},{"full_name":"Kleinman, S.","first_name":"S.","last_name":"Kleinman"},{"last_name":"Krolik","full_name":"Krolik, Julian H.","first_name":"Julian H."},{"full_name":"Krzesinski, Jurek","first_name":"Jurek","last_name":"Krzesinski"},{"last_name":"Kunszt","first_name":"Peter Z.","full_name":"Kunszt, Peter Z."},{"first_name":"D. Q.","full_name":"Lamb, D. Q.","last_name":"Lamb"},{"last_name":"Long","full_name":"Long, Daniel C.","first_name":"Daniel C."},{"first_name":"Robert H.","full_name":"Lupton, Robert H.","last_name":"Lupton"},{"full_name":"Miknaitis, Gajus","first_name":"Gajus","last_name":"Miknaitis"},{"full_name":"Munn, Jeffrey A.","first_name":"Jeffrey A.","last_name":"Munn"},{"last_name":"Narayanan","first_name":"Vijay K.","full_name":"Narayanan, Vijay K."},{"last_name":"Neilsen","first_name":"Eric","full_name":"Neilsen, Eric"},{"last_name":"Newman","full_name":"Newman, P. R.","first_name":"P. R."},{"first_name":"Atsuko","full_name":"Nitta, Atsuko","last_name":"Nitta"},{"last_name":"Okamura","full_name":"Okamura, Sadanori","first_name":"Sadanori"},{"last_name":"Pentericci","first_name":"Laura","full_name":"Pentericci, Laura"},{"full_name":"Pier, Jeffrey R.","first_name":"Jeffrey R.","last_name":"Pier"},{"last_name":"Schlegel","first_name":"David J.","full_name":"Schlegel, David J."},{"full_name":"Snedden, S.","first_name":"S.","last_name":"Snedden"},{"full_name":"Szalay, Alexander S.","first_name":"Alexander S.","last_name":"Szalay"},{"last_name":"Thakar","first_name":"Anirudda R.","full_name":"Thakar, Anirudda R."},{"last_name":"Tsvetanov","full_name":"Tsvetanov, Zlatan","first_name":"Zlatan"},{"first_name":"Richard L.","full_name":"White, Richard L.","last_name":"White"},{"full_name":"Zheng, Wei","first_name":"Wei","last_name":"Zheng"}],"date_published":"2002-08-01T00:00:00Z","doi":"10.1086/340546","quality_controlled":"1","title":"Unusual broad absorption line quasars from the sloan digital sky survey","oa_version":"Preprint","extern":"1","oa":1,"date_updated":"2024-11-12T10:02:25Z","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.astro-ph/0203252","open_access":"1"}],"article_type":"original","publication_identifier":{"eissn":["1538-4365"],"issn":["0067-0049"]},"volume":141,"page":"267-309","OA_type":"free access","publication":"The Astrophysical Journal Supplement Series","publisher":"American Astronomical Society","date_created":"2024-09-06T11:30:40Z","intvolume":"       141","citation":{"ista":"Hall PB, Anderson SF, Strauss MA, York DG, Richards GT, Fan X, Knapp GR, Schneider DP, Vanden Berk DE, Geballe TR, Bauer AE, Becker RH, Davis M, Rix H, Nichol RC, Bahcall NA, Brinkmann J, Brunner R, Connolly AJ, Csabai I, Doi M, Fukugita M, Gunn JE, Haiman Z, Harvanek M, Heckman TM, Hennessy GS, Inada N, Ivezić Ž, Johnston D, Kleinman S, Krolik JH, Krzesinski J, Kunszt PZ, Lamb DQ, Long DC, Lupton RH, Miknaitis G, Munn JA, Narayanan VK, Neilsen E, Newman PR, Nitta A, Okamura S, Pentericci L, Pier JR, Schlegel DJ, Snedden S, Szalay AS, Thakar AR, Tsvetanov Z, White RL, Zheng W. 2002. Unusual broad absorption line quasars from the sloan digital sky survey. The Astrophysical Journal Supplement Series. 141(2), 267–309.","apa":"Hall, P. B., Anderson, S. F., Strauss, M. A., York, D. G., Richards, G. T., Fan, X., … Zheng, W. (2002). Unusual broad absorption line quasars from the sloan digital sky survey. <i>The Astrophysical Journal Supplement Series</i>. American Astronomical Society. <a href=\"https://doi.org/10.1086/340546\">https://doi.org/10.1086/340546</a>","chicago":"Hall, Patrick B., Scott F. Anderson, Michael A. Strauss, Donald G. York, Gordon T. Richards, Xiaohui Fan, G. R. Knapp, et al. “Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey.” <i>The Astrophysical Journal Supplement Series</i>. American Astronomical Society, 2002. <a href=\"https://doi.org/10.1086/340546\">https://doi.org/10.1086/340546</a>.","ieee":"P. B. Hall <i>et al.</i>, “Unusual broad absorption line quasars from the sloan digital sky survey,” <i>The Astrophysical Journal Supplement Series</i>, vol. 141, no. 2. American Astronomical Society, pp. 267–309, 2002.","ama":"Hall PB, Anderson SF, Strauss MA, et al. Unusual broad absorption line quasars from the sloan digital sky survey. <i>The Astrophysical Journal Supplement Series</i>. 2002;141(2):267-309. doi:<a href=\"https://doi.org/10.1086/340546\">10.1086/340546</a>","mla":"Hall, Patrick B., et al. “Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey.” <i>The Astrophysical Journal Supplement Series</i>, vol. 141, no. 2, American Astronomical Society, 2002, pp. 267–309, doi:<a href=\"https://doi.org/10.1086/340546\">10.1086/340546</a>.","short":"P.B. Hall, S.F. Anderson, M.A. Strauss, D.G. York, G.T. Richards, X. Fan, G.R. Knapp, D.P. Schneider, D.E. Vanden Berk, T.R. Geballe, A.E. Bauer, R.H. Becker, M. Davis, H. Rix, R.C. Nichol, N.A. Bahcall, J. Brinkmann, R. Brunner, A.J. Connolly, I. Csabai, M. Doi, M. Fukugita, J.E. Gunn, Z. Haiman, M. Harvanek, T.M. Heckman, G.S. Hennessy, N. Inada, Ž. Ivezić, D. Johnston, S. Kleinman, J.H. Krolik, J. Krzesinski, P.Z. Kunszt, D.Q. Lamb, D.C. Long, R.H. Lupton, G. Miknaitis, J.A. Munn, V.K. Narayanan, E. Neilsen, P.R. Newman, A. Nitta, S. Okamura, L. Pentericci, J.R. Pier, D.J. Schlegel, S. Snedden, A.S. Szalay, A.R. Thakar, Z. Tsvetanov, R.L. White, W. Zheng, The Astrophysical Journal Supplement Series 141 (2002) 267–309."},"language":[{"iso":"eng"}],"external_id":{"arxiv":["astro-ph/0203252"]},"month":"08","_id":"17802","OA_place":"repository","abstract":[{"lang":"eng","text":"The Sloan Digital Sky Survey has confirmed the existence of populations of broad absorption line (BAL) quasars with various unusual properties. We present and discuss 23 such objects and consider the implications of their wide range of properties for models of BAL outflows and quasars in general. We have discovered one BAL quasar with a record number of absorption lines. Two other similarly complex objects with many narrow troughs show broad Mg II absorption extending longward of their systemic host galaxy redshifts. This can be explained as absorption of an extended continuum source by the rotation-dominated base of a disk wind. Five other objects have absorption that removes an unprecedented ∼90% of all flux shortward of Mg II. The absorption in one of them has varied across the ultraviolet with an amplitude and rate of change as great as ever seen. This same object may also show broad Hβ absorption. Numerous reddened BAL quasars have been found, including at least one reddened mini-BAL quasar with very strong Fe II emission. The five reddest objects have continuum reddenings of E(B-V) ≃ 0.5, and in two of them we find strong evidence that the reddening curve is even steeper than that of the SMC. We have found at least one object with absorption from Fe III but not Fe II. This may be due to a high column density of moderately high ionization gas, but the Fe III level populations must also be affected by some sort of resonance. Finally, we have found two luminous, probably reddened high-redshift objects that may be BAL quasars whose troughs partially cover different regions of the continuum source as a function of velocity."}],"type":"journal_article","scopus_import":"1","issue":"2","status":"public"}]