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http://hdl.handle.net/20.500.12386/31186
Title: | The Typical Massive Quiescent Galaxy at z ˜ 3 is a Post-starburst | Authors: | D'Eugenio, C. Daddi, E. Gobat, R. STRAZZULLO, VERONICA Lustig, P. DELVECCHIO, IVAN Jin, S. Puglisi, A. CALABRO, ANTONELLO MANCINI, CHIARA Dickinson, M. Cimatti, A. Onodera, M. |
Issue Date: | 2020 | Journal: | THE ASTROPHYSICAL JOURNAL LETTERS | Number: | 892 | Issue: | 1 | First Page: | L2 | Abstract: | We have obtained spectroscopic confirmation with Hubble Space Telescope WFC3/G141 of a first sizeable sample of nine quiescent galaxies at 2.4 < z < 3.3. Their average near-UV/optical rest-frame spectrum is characterized by low attenuation (A<SUB>V</SUB> ˜ 0.6 mag) and a strong Balmer break, larger than the 4000 Å break, corresponding to a fairly young age of ˜300 Myr. This formally classifies a substantial fraction of classically selected quiescent galaxies at z ˜ 3 as post-starbursts, marking their convergence to the quenching epoch. The rapid spectral evolution with respect to z ˜ 1.5 quiescent galaxies is not matched by an increase of residual star formation, as judged from the weak detection of [O II]λ3727 emission, pointing to a flattening of the steep increase in gas fractions previously seen from z ˜ 0 to 1.8. However, radio 3 GHz stacked emission implies either much stronger dust-obscured star formation or substantial further evolution in radio-mode AGN activity with respect to z ˜ 1.5. | URI: | http://hdl.handle.net/20.500.12386/31186 | URL: | https://iopscience.iop.org/article/10.3847/2041-8213/ab7a96 | ISSN: | 2041-8205 | DOI: | 10.3847/2041-8213/ab7a96 | Bibcode ADS: | 2020ApJ...892L...2D | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Deugenio2020.pdf | preprint | 5.12 MB | Unknown | View/Open |
D’Eugenio_2020_ApJL_892_L2.pdf | [Administrators only] | 657.09 kB | Adobe PDF |
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