---
OA_place: publisher
OA_type: hybrid
_id: '18447'
abstract:
- lang: eng
  text: We present the first results on the spatial distribution of star formation
    in 454 star-forming galaxies just after the epoch of reionisation (4.8 < z < 6.5)
    using Hα emission-line maps and F444W imaging that traces the stellar continuum
    from the JWST FRESCO NIRCam Slitless Spectroscopy Survey. The Hα equivalent width
    profiles of star-forming galaxies across the main sequence at z ∼ 5.3 with stellar
    masses 6.8≤ log(M*/M⊙) < 11.1 increase with radius, which provides direct evidence
    for the inside-out growth of star-forming galaxies just after the epoch of reionisation.
    GALFIT was used to calculate half-light radii, Reff, and central surface densities
    within 1 kiloparsec, Σ1kpc of Hα and the continuum. At a fixed stellar mass of
    Log(M*/M⊙) = 9.5, Σ1kpc, Hα is 1.04 ± 0.05 times higher than Σ1kpc, C, Reff, Hα
    is 1.18 ± 0.03 times larger than Reff, C and both Reff measurements are smaller
    than 1 kiloparsec. These measurements suggest the rapid build-up of compact bulges
    via star formation just after the epoch of reionisation. By comparison to analogous
    work done at lower redshifts with Hubble Space Telescope WFC3 slitless spectroscopy
    as part of the 3D-HST (z ∼ 1) and CLEAR (z ∼ 0.5) surveys, we find that Reff(z)
    evolves at the same pace for Hα and the continuum, but Σ1kpc(z) evolves faster
    for Hα than the stellar continuum. As a function of the Hubble parameter, Reff, Hα/Reff,C = 1.1h(z)
    and Σ1 kpc, Hα/Σ1 kpc,C = h(z)1.3. These parametrisations suggest that the inside-out
    growth of the disk starts to dominate the inside-out growth of the bulge towards
    lower redshifts. This is supported by the redshift evolution in the EW(Hα) profiles
    from FRESCO, 3D-HST, and CLEAR at fixed stellar mass and when star-forming progenitors
    are traced, in which in EW(Hα) rapidly increases with radius within the half-light
    radius at z ∼ 5.3, but EW(Hα) increases only significantly with radius in the
    outer disk at z ∼ 0.5.
acknowledgement: "JM is grateful to the Cosmic Dawn Center for the DAWN Fellowship.
  JM thanks Adam Muzzin, Viola Gelli and Anne Hutter for useful discussions that led
  to improvements in the analysis presented in this paper. This work is based on observations
  made with the NASA/ESA/CSA James Webb Space Telescope. The raw data were obtained
  from the Mikulski Archive for\r\nSpace Telescopes at the Space Telescope Science
  Institute, which is operated by the Association of Universities for Research in
  Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are
  associated with JWST Cycle 1 GO program #1895. Support for program JWST-GO-1895
  was provided by NASA through a grant from the Space Telescope Science Institute,
  which is operated by the Associations of Universities for Research in Astronomy,
  Incorporated, under NASA contract NAS5-26555. The Cosmic Dawn Center  DAWN) is funded
  by the Danish National Research Foundation under grant DNRF140.\r\nThis work has
  received funding from the Swiss State Secretariat for Education, Research and Innovation
  (SERI) under contract number MB22.00072, as well as from the Swiss National Science
  Foundation (SNSF) through project grant 200020_207349. RPN thanks the NASA Hubble
  Fellowshp Program for the Hubble Fellowship. DM acknowledges funding from JWST-GO-01895.013,
  provided through a grant from the STScI under NASA contract NAS5-03127."
article_number: A64
article_processing_charge: Yes (in subscription journal)
article_type: original
arxiv: 1
author:
- first_name: Jasleen
  full_name: Matharu, Jasleen
  last_name: Matharu
- first_name: Erica J.
  full_name: Nelson, Erica J.
  last_name: Nelson
- first_name: Gabriel
  full_name: Brammer, Gabriel
  last_name: Brammer
- first_name: Pascal A.
  full_name: Oesch, Pascal A.
  last_name: Oesch
- first_name: Natalie
  full_name: Allen, Natalie
  last_name: Allen
- first_name: Irene
  full_name: Shivaei, Irene
  last_name: Shivaei
- first_name: Rohan P.
  full_name: Naidu, Rohan P.
  last_name: Naidu
- first_name: John
  full_name: Chisholm, John
  last_name: Chisholm
- first_name: Alba
  full_name: Covelo-Paz, Alba
  last_name: Covelo-Paz
- first_name: Yoshinobu
  full_name: Fudamoto, Yoshinobu
  last_name: Fudamoto
- first_name: Emma
  full_name: Giovinazzo, Emma
  last_name: Giovinazzo
- first_name: Thomas
  full_name: Herard-Demanche, Thomas
  last_name: Herard-Demanche
- first_name: Josephine
  full_name: Kerutt, Josephine
  last_name: Kerutt
- first_name: Ivan
  full_name: Kramarenko, Ivan
  id: 9a9394cb-3200-11ee-973b-f5ba2a8b16e4
  last_name: Kramarenko
  orcid: 0000-0001-5346-6048
- first_name: Danilo
  full_name: Marchesini, Danilo
  last_name: Marchesini
- first_name: Romain A.
  full_name: Meyer, Romain A.
  last_name: Meyer
- first_name: Gonzalo
  full_name: Prieto-Lyon, Gonzalo
  last_name: Prieto-Lyon
- first_name: Naveen
  full_name: Reddy, Naveen
  last_name: Reddy
- first_name: Marko
  full_name: Shuntov, Marko
  last_name: Shuntov
- first_name: Andrea
  full_name: Weibel, Andrea
  last_name: Weibel
- first_name: Stijn
  full_name: Wuyts, Stijn
  last_name: Wuyts
- first_name: Mengyuan
  full_name: Xiao, Mengyuan
  last_name: Xiao
citation:
  ama: Matharu J, Nelson EJ, Brammer G, et al. A first look at spatially resolved
    star formation at 4.8 &#60; z &#60; 6.5 with JWST FRESCO NIRCam slitless spectroscopy.
    <i>Astronomy &#38; Astrophysics</i>. 2024;690. doi:<a href="https://doi.org/10.1051/0004-6361/202450522">10.1051/0004-6361/202450522</a>
  apa: Matharu, J., Nelson, E. J., Brammer, G., Oesch, P. A., Allen, N., Shivaei,
    I., … Xiao, M. (2024). A first look at spatially resolved star formation at 4.8
    &#60; z &#60; 6.5 with JWST FRESCO NIRCam slitless spectroscopy. <i>Astronomy
    &#38; Astrophysics</i>. EDP Sciences. <a href="https://doi.org/10.1051/0004-6361/202450522">https://doi.org/10.1051/0004-6361/202450522</a>
  chicago: Matharu, Jasleen, Erica J. Nelson, Gabriel Brammer, Pascal A. Oesch, Natalie
    Allen, Irene Shivaei, Rohan P. Naidu, et al. “A First Look at Spatially Resolved
    Star Formation at 4.8 &#60; z &#60; 6.5 with JWST FRESCO NIRCam Slitless Spectroscopy.”
    <i>Astronomy &#38; Astrophysics</i>. EDP Sciences, 2024. <a href="https://doi.org/10.1051/0004-6361/202450522">https://doi.org/10.1051/0004-6361/202450522</a>.
  ieee: J. Matharu <i>et al.</i>, “A first look at spatially resolved star formation
    at 4.8 &#60; z &#60; 6.5 with JWST FRESCO NIRCam slitless spectroscopy,” <i>Astronomy
    &#38; Astrophysics</i>, vol. 690. EDP Sciences, 2024.
  ista: Matharu J, Nelson EJ, Brammer G, Oesch PA, Allen N, Shivaei I, Naidu RP, Chisholm
    J, Covelo-Paz A, Fudamoto Y, Giovinazzo E, Herard-Demanche T, Kerutt J, Kramarenko
    I, Marchesini D, Meyer RA, Prieto-Lyon G, Reddy N, Shuntov M, Weibel A, Wuyts
    S, Xiao M. 2024. A first look at spatially resolved star formation at 4.8 &#60;
    z &#60; 6.5 with JWST FRESCO NIRCam slitless spectroscopy. Astronomy &#38; Astrophysics.
    690, A64.
  mla: Matharu, Jasleen, et al. “A First Look at Spatially Resolved Star Formation
    at 4.8 &#60; z &#60; 6.5 with JWST FRESCO NIRCam Slitless Spectroscopy.” <i>Astronomy
    &#38; Astrophysics</i>, vol. 690, A64, EDP Sciences, 2024, doi:<a href="https://doi.org/10.1051/0004-6361/202450522">10.1051/0004-6361/202450522</a>.
  short: J. Matharu, E.J. Nelson, G. Brammer, P.A. Oesch, N. Allen, I. Shivaei, R.P.
    Naidu, J. Chisholm, A. Covelo-Paz, Y. Fudamoto, E. Giovinazzo, T. Herard-Demanche,
    J. Kerutt, I. Kramarenko, D. Marchesini, R.A. Meyer, G. Prieto-Lyon, N. Reddy,
    M. Shuntov, A. Weibel, S. Wuyts, M. Xiao, Astronomy &#38; Astrophysics 690 (2024).
das_tickbox: '1'
date_created: 2024-10-20T22:02:06Z
date_published: 2024-10-01T00:00:00Z
date_updated: 2026-07-08T06:43:28Z
day: '01'
ddc:
- '520'
department:
- _id: JoMa
doi: 10.1051/0004-6361/202450522
external_id:
  arxiv:
  - '2404.17629'
  isi:
  - '001322237700004'
file:
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  creator: dernst
  date_created: 2024-10-21T11:45:35Z
  date_updated: 2024-10-21T11:45:35Z
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  success: 1
file_date_updated: 2024-10-21T11:45:35Z
has_accepted_license: '1'
intvolume: '       690'
isi: 1
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '10'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
  eissn:
  - 1432-0746
  issn:
  - 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: A first look at spatially resolved star formation at 4.8 < z < 6.5 with JWST
  FRESCO NIRCam slitless spectroscopy
tmp:
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  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: 690
year: '2024'
...