The abundance of z≳10 galaxy candidates in the HUDF using deep JWST NIRCam medium-band imaging

C. T. Donnan; D. J. McLeod; R. J. McLure; J. S. Dunlop; A. C. Carnall; F. Cullen; D. Magee

doi:10.1093/mnras/stad471

The abundance of z≳10 galaxy candidates in the HUDF using deep JWST NIRCam medium-band imaging

C. T. Donnan^*, D. J. McLeod, R. J. McLure, J. S. Dunlop, A. C. Carnall, F. Cullen, D. Magee

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

We utilise JWST NIRCam medium-band imaging to search for extreme redshift (z≥9.5) galaxy candidates in the Hubble Ultra Deep Field (HUDF) and the additional pointing within the GOODS-South field provided by the second NIRCam module. Our search reveals 6 robust candidates, 3 of which have recently been spectroscopically confirmed. One of these 3 is the previously controversial z≃12 galaxy candidate UDF-22980 which is now detected in five JWST NIRCam medium-band filters (F182M, F210M, F430M, F460M and F480M), efficiently excluding alternative low-redshift solutions and allowing us to now report a secure photometric redshift of z=11.6±0.2. We also detect 2 galaxies at z≥12.5 including a newly-detected candidate in the imaging provided by the second NIRCam module (south-west of the HUDF) at z=12.6±0.6. We determine the physical properties of the 6 galaxies by fitting the 14-band photometry with Bagpipes. We find stellar masses of log(M⋆/M⊙)≃7.5−8.7 and star-formation rates of log(SFR/M−1⊙yr−1)≃0.3−5.0. Despite the relatively small cosmological volume covered by the HUDF itself and the second NIRCam module imaging, we find that the existence of these galaxies is fully consistent with the latest measurements of both the UV luminosity function and cosmic star-formation rate density at z≃11, supporting a gradual steady decline in the cosmic star-formation rate density out to at least z≃15.

Original language	English
Pages (from-to)	4554-4561
Number of pages	8
Journal	Monthly Notices of the Royal Astronomical Society
Volume	520
Issue number	3
Early online date	10 Feb 2023
DOIs	https://doi.org/10.1093/mnras/stad471
Publication status	Published - 1 Apr 2023

Keywords / Materials (for Non-textual outputs)

galaxies: evolution
galaxies: formation
galaxies: high redshift

Access to Document

10.1093/mnras/stad471Licence: Creative Commons: Attribution (CC-BY)

2212.10126v2Accepted author manuscript, 1.08 MBLicence: Creative Commons: Attribution (CC-BY)

https://arxiv.org/abs/2212.10126Licence: Creative Commons: Attribution (CC-BY)

Cite this

@article{6abdbe84a17e466e8ec9d4c91f12858d,

title = "The abundance of z≳10 galaxy candidates in the HUDF using deep JWST NIRCam medium-band imaging",

abstract = "We utilise JWST NIRCam medium-band imaging to search for extreme redshift (z≥9.5) galaxy candidates in the Hubble Ultra Deep Field (HUDF) and the additional pointing within the GOODS-South field provided by the second NIRCam module. Our search reveals 6 robust candidates, 3 of which have recently been spectroscopically confirmed. One of these 3 is the previously controversial z≃12 galaxy candidate UDF-22980 which is now detected in five JWST NIRCam medium-band filters (F182M, F210M, F430M, F460M and F480M), efficiently excluding alternative low-redshift solutions and allowing us to now report a secure photometric redshift of z=11.6±0.2. We also detect 2 galaxies at z≥12.5 including a newly-detected candidate in the imaging provided by the second NIRCam module (south-west of the HUDF) at z=12.6±0.6. We determine the physical properties of the 6 galaxies by fitting the 14-band photometry with Bagpipes. We find stellar masses of log(M⋆/M⊙)≃7.5−8.7 and star-formation rates of log(SFR/M−1⊙yr−1)≃0.3−5.0. Despite the relatively small cosmological volume covered by the HUDF itself and the second NIRCam module imaging, we find that the existence of these galaxies is fully consistent with the latest measurements of both the UV luminosity function and cosmic star-formation rate density at z≃11, supporting a gradual steady decline in the cosmic star-formation rate density out to at least z≃15. ",

keywords = "galaxies: evolution, galaxies: formation, galaxies: high redshift",

author = "Donnan, {C. T.} and McLeod, {D. J.} and McLure, {R. J.} and Dunlop, {J. S.} and Carnall, {A. C.} and F. Cullen and D. Magee",

note = "8 pages, 4 figures, accepted for publication in MNRAS Funding Information: The authors thank the referee Richard S. Ellis for useful comments which helped improve the quality of the manuscript. The authors are grateful to Stephen Wilkins and Andrea Incatasciato for providing simulation data. CTD, DJM, RJM, and JSD acknowledge the support of the Science and Technology Facilities Council. ACC thanks the Leverhulme Trust for their support via the Leverhulme Early Career Fellowship scheme. FC acknowledges support from a UKRI Frontier Research Guarantee Grant [grant reference EP/X021025/1]. For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising from this submission. Publisher Copyright: {\textcopyright} 2023 The Author(s).",

year = "2023",

month = apr,

day = "1",

doi = "10.1093/mnras/stad471",

language = "English",

volume = "520",

pages = "4554--4561",

journal = "Monthly Notices of the Royal Astronomical Society ",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

TY - JOUR

T1 - The abundance of z≳10 galaxy candidates in the HUDF using deep JWST NIRCam medium-band imaging

AU - Donnan, C. T.

AU - McLeod, D. J.

AU - McLure, R. J.

AU - Dunlop, J. S.

AU - Carnall, A. C.

AU - Cullen, F.

AU - Magee, D.

N1 - 8 pages, 4 figures, accepted for publication in MNRAS Funding Information: The authors thank the referee Richard S. Ellis for useful comments which helped improve the quality of the manuscript. The authors are grateful to Stephen Wilkins and Andrea Incatasciato for providing simulation data. CTD, DJM, RJM, and JSD acknowledge the support of the Science and Technology Facilities Council. ACC thanks the Leverhulme Trust for their support via the Leverhulme Early Career Fellowship scheme. FC acknowledges support from a UKRI Frontier Research Guarantee Grant [grant reference EP/X021025/1]. For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising from this submission. Publisher Copyright: © 2023 The Author(s).

PY - 2023/4/1

Y1 - 2023/4/1

N2 - We utilise JWST NIRCam medium-band imaging to search for extreme redshift (z≥9.5) galaxy candidates in the Hubble Ultra Deep Field (HUDF) and the additional pointing within the GOODS-South field provided by the second NIRCam module. Our search reveals 6 robust candidates, 3 of which have recently been spectroscopically confirmed. One of these 3 is the previously controversial z≃12 galaxy candidate UDF-22980 which is now detected in five JWST NIRCam medium-band filters (F182M, F210M, F430M, F460M and F480M), efficiently excluding alternative low-redshift solutions and allowing us to now report a secure photometric redshift of z=11.6±0.2. We also detect 2 galaxies at z≥12.5 including a newly-detected candidate in the imaging provided by the second NIRCam module (south-west of the HUDF) at z=12.6±0.6. We determine the physical properties of the 6 galaxies by fitting the 14-band photometry with Bagpipes. We find stellar masses of log(M⋆/M⊙)≃7.5−8.7 and star-formation rates of log(SFR/M−1⊙yr−1)≃0.3−5.0. Despite the relatively small cosmological volume covered by the HUDF itself and the second NIRCam module imaging, we find that the existence of these galaxies is fully consistent with the latest measurements of both the UV luminosity function and cosmic star-formation rate density at z≃11, supporting a gradual steady decline in the cosmic star-formation rate density out to at least z≃15.

AB - We utilise JWST NIRCam medium-band imaging to search for extreme redshift (z≥9.5) galaxy candidates in the Hubble Ultra Deep Field (HUDF) and the additional pointing within the GOODS-South field provided by the second NIRCam module. Our search reveals 6 robust candidates, 3 of which have recently been spectroscopically confirmed. One of these 3 is the previously controversial z≃12 galaxy candidate UDF-22980 which is now detected in five JWST NIRCam medium-band filters (F182M, F210M, F430M, F460M and F480M), efficiently excluding alternative low-redshift solutions and allowing us to now report a secure photometric redshift of z=11.6±0.2. We also detect 2 galaxies at z≥12.5 including a newly-detected candidate in the imaging provided by the second NIRCam module (south-west of the HUDF) at z=12.6±0.6. We determine the physical properties of the 6 galaxies by fitting the 14-band photometry with Bagpipes. We find stellar masses of log(M⋆/M⊙)≃7.5−8.7 and star-formation rates of log(SFR/M−1⊙yr−1)≃0.3−5.0. Despite the relatively small cosmological volume covered by the HUDF itself and the second NIRCam module imaging, we find that the existence of these galaxies is fully consistent with the latest measurements of both the UV luminosity function and cosmic star-formation rate density at z≃11, supporting a gradual steady decline in the cosmic star-formation rate density out to at least z≃15.

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: high redshift

U2 - 10.1093/mnras/stad471

DO - 10.1093/mnras/stad471

M3 - Article

SN - 0035-8711

VL - 520

SP - 4554

EP - 4561

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The abundance of z≳10 galaxy candidates in the HUDF using deep JWST NIRCam medium-band imaging

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

Access to Document

Fingerprint

Cite this