 |
Journal articles
The Early Early Type: Discovery of a Passive Galaxy at $_{Zspec}$ $\sim$ 3
Abstract : We present the discovery of a massive, quiescent galaxy at $z$ = 2.99. We have obtained an $Hubble\ Space\ Telescope$ WFC3 spectrum of this object and measured its redshift from the detection of a deep 4000 $\mathring{A}$ break consistent with an old population and a high metallicity. By stellar population modeling of both its grism spectrum and broadband photometry, we derive an age of $\sim$0.7 Gyr, implying a formation redshift of $z$ > 4, and a mass >10$^{11}$ $M \odot$. Although this passive galaxy is the most distant confirmed so far, we find that it is slightly less compact than other $z$ > 2 early types of similar mass, being overall more analogous to those $z$ $\sim$ 1.6 field early-type galaxies. The discovery of this object shows that early-type galaxies are detectable to at least $z$ = 3 and suggests that the diversity of structural properties found in $z$ = 1.4-2 ellipticals to earlier epochs could have its origin in a variety of formation histories among their progenitors.
Cited literature [43 references]
https://hal-cea.archives-ouvertes.fr/cea-00832191
Contributor : Bruno Savelli <>
Submitted on : Tuesday, September 24, 2019 - 10:37:06 AM
Last modification on : Friday, October 30, 2020 - 12:04:03 PM
Long-term archiving on: : Sunday, February 9, 2020 - 5:28:09 PM
Contributor : Bruno Savelli <>
Submitted on : Tuesday, September 24, 2019 - 10:37:06 AM
Last modification on : Friday, October 30, 2020 - 12:04:03 PM
Long-term archiving on: : Sunday, February 9, 2020 - 5:28:09 PM
File
Gobat.pdf
Publisher files allowed on an open archive