摘要: We utilize $\sim17000$ bright Luminous Red Galaxies (LRGs) from the novel
Dark Energy Spectroscopic Instrument Survey Validation spectroscopic sample,
leveraging its deep ($\sim2.5$ hour/galaxy exposure time) spectra to
characterize the contribution of recently quenched galaxies to the massive
galaxy population at $0.41$) of our sample of
recently quenched galaxies represents the largest spectroscopic sample of
post-starburst galaxies at that epoch. At $0.411.2$) LRGs by measuring the fraction of
stellar mass each galaxy formed in the Gyr before observation, $f_{\mathrm{1
Gyr}}$. Although galaxies with $f_{\mathrm{1 Gyr}}>0.1$ are rare at $z\sim0.4$
($\lesssim 0.5\%$ of the population), by $z\sim0.8$ they constitute $\sim3\%$
of massive galaxies. Relaxing this threshold, we find that galaxies with
$f_\mathrm{1 Gyr}>5\%$ constitute $\sim10\%$ of the massive galaxy population
at $z\sim0.8$. We also identify a small but significant sample of galaxies at
$z=1.1-1.3$ that formed with $f_{\mathrm{1 Gyr}}>50\%$, implying that they may
be analogues to high-redshift quiescent galaxies that formed on similar
timescales. Future analysis of this unprecedented sample promises to illuminate
the physical mechanisms that drive the quenching of massive galaxies after
cosmic noon.
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分类：
天文学
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天文学
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引用：
ChinaXiv:202303.05961
(或此版本
ChinaXiv:202303.05961V1)
DOI:10.12074/202303.05961V1
CSTR:32003.36.ChinaXiv.202303.05961.V1
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科创链TXID：
1d6735cb-11c1-458b-a7a4-52db58acb307
- 推荐引用方式：
David J. Setton,Biprateep Dey,Gourav Khullar,Rachel Bezanson,Jeffrey A. Newman,Jessica N. Aguilar,Steven Ahlen,Brett H. Andrews,David Brooks,Axel de la Macorra,Arjun Dey,Sarah Eftekharzadeh,Andreu Font-Ribera,Satya Gontcho A Gontcho,Anthony Kremin,Stephanie Juneau,Martin Landriau,Aaron Meisner,Ramon Miquel,John Moustakas,Alan Pearl,Francisco Prada,Gregory Tarle,Malgorzata Siudek,Benjamin Alan Weaver,Zhimin Zhou,Hu Zou.DESI Survey Validation Spectra Reveal an Increasing Fraction of Recently
Quenched Galaxies at $z\sim1$.中国科学院科技论文预发布平台.[ChinaXiv:202303.05961V1]
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