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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29015
Title: Rejuvenation in z ∼ 0.8 Quiescent Galaxies in LEGA-C
Authors: Chauke, Priscilla
VAN DER WEL, ARJEN
Pacifici, Camilla
Bezanson, Rachel
Wu, Po-Feng
GALLAZZI, Anna Rita 
Straatman, Caroline
Franx, Marijn
Barišić, Ivana
Bell, Eric F.
van Houdt, Josha
Maseda, Michael V.
Muzzin, Adam
Sobral, David
Spilker, Justin
Issue Date: 2019
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 877
Issue: 1
First Page: 48
Abstract: We use reconstructed star formation (SF) histories of quiescent galaxies at z = 0.6-1 in the Large Early Galaxy Astrophysics Census survey to identify secondary SF episodes that, after an initial period of quiescence, moved the galaxies back to the star-forming main sequence (blue cloud). 16 ± 3% of the z ∼ 0.8 quiescent population has experienced such rejuvenation events in the redshift range of 0.7 < z < 1.5 after reaching quiescence at some earlier time. On average, these galaxies first became quiescent at z = 1.2, and those that rejuvenated, remained quiescent for ∼1 Gyr before their secondary SF episode, which lasted ∼0.7 Gyr. The stellar mass attributed to rejuvenation is on average 10% of the galaxy stellar mass, with rare instances of an increase of more than a factor of 2. Overall, rejuvenation events only contribute ∼2% of the total stellar mass in z ∼ 0.8 quiescent galaxies and we conclude that rejuvenation is not an important evolutionary channel when considering the growth of the red sequence. However, our results complicate the interpretation of galaxy demographics in color space: the galaxies with rejuvenation events tend to lie in the so-called “green valley,” yet their progenitors were quiescent at z ∼ 2.
URI: http://hdl.handle.net/20.500.12386/29015
URL: https://iopscience.iop.org/article/10.3847/1538-4357/ab164d
ISSN: 0004-637X
DOI: 10.3847/1538-4357/ab164d
Bibcode ADS: 2019ApJ...877...48C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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