Accelerated galaxy growth and environmental quenching in a protocluster at z=3.24. Shi, K., Toshikawa, J., Lee, K., Wang, T., Cai, Z., & Fang, T. arXiv e-prints, 2102:arXiv:2102.06499, February, 2021. ![Accelerated galaxy growth and environmental quenching in a protocluster at z=3.24 [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex 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 \textless z \textless 3.4, among which \textasciitilde 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 the 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 shed 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.
@article{shi_accelerated_2021,
title = {Accelerated galaxy growth and environmental quenching in a protocluster at z=3.24},
volume = {2102},
url = {http://adsabs.harvard.edu/abs/2021arXiv210206499S},
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 {\textless} z {\textless} 3.4,
among which {\textasciitilde} 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 the 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 shed 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.},
urldate = {2021-02-15},
journal = {arXiv e-prints},
author = {Shi, Ke and Toshikawa, Jun and Lee, Kyoung-Soo and Wang, Tao and Cai, Zheng and Fang, Taotao},
month = feb,
year = {2021},
keywords = {Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics},
pages = {arXiv:2102.06499},
}
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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 the 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. 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The quiescent\ngalaxies are among the most massive and reddest ones in the entire\nsample. We identify a large photo-z galaxy overdensity in the field,\nwhich lies close to the previously spectroscopically confirmed sources\nof the protocluster. We find that the quiescent galaxies are largely\nconcentrated in the overdense protocluster region with a higher\nquiescent fraction, showing a sign of environmental quenching. Galaxies\nin the protocluster are forming faster than the field counterparts as\nseen in the stellar mass function, suggesting early and accelerated mass\nassembly in the overdense regions. Although weak evidence of suppressed\nstar-formation is found in the protocluster, the statistics are not\nsignificant enough to draw a definite conclusion. 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