Projects per year
Abstract
We present a multiwavelength study of galaxies around D4UD01, a spectroscopically confirmed protocluster at z = 3.24, to investigate environmental trends. 450 galaxies are selected based on KS band detection with photometric redshifts (photo-z) at 3.0 < z < 3.4, among which ∼12% are classified as quiescent galaxies. The quiescent galaxies are among the most massive and reddest ones in the entire sample. We identify a large photo-z galaxy overdensity in the field, which lies close to the previously spectroscopically confirmed sources of the protocluster. We find that the quiescent galaxies are largely concentrated in the overdense protocluster region with a higher quiescent fraction, showing a sign of environmental quenching. Galaxies in the protocluster are forming faster than their field counterparts as seen in the stellar mass function, suggesting early and accelerated mass assembly in the overdense regions. Although weak evidence of suppressed star formation is found in the protocluster, the statistics are not significant enough to draw a definite conclusion. Our work sheds light on how the formation of massive galaxies is affected in the dense region of a protocluster when the universe was only 2 Gyr old.
Original language | English |
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Article number | 46 |
Journal | The Astrophysical Journal |
Volume | 911 |
Issue number | 1 |
DOIs | |
Publication status | Published - 14 Apr 2021 |
Bibliographical note
Publisher Copyright:© 2021 Institute of Physics Publishing. All rights reserved.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
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- 1 Finished
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Astrophysics at the University of Bath 2020-2023
Wuyts, S. (PI) & Toshikawa, J. (Researcher)
Science and Technology Facilities Council
1/04/20 → 31/03/24
Project: Research council