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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/20.500.12386/30165
Title: CANDELS: Elevated Black Hole Growth in the Progenitors of Compact Quiescent Galaxies at z ̃ 2
Authors: Kocevski, Dale D.
Barro, Guillermo
Faber, S. M.
Dekel, Avishai
Somerville, Rachel S.
Young, Joshua A.
Williams, Christina C.
McIntosh, Daniel H.
Georgakakis, Antonis
Hasinger, Guenther
Nandra, Kirpal
Civano, Francesca
Alexander, David M.
Almaini, Omar
Conselice, Christopher J.
Donley, Jennifer L.
Ferguson, Harry C.
Giavalisco, Mauro
Grogin, Norman A.
Hathi, Nimish
Hawkins, Matthew
Koekemoer, Anton M.
Koo, David C.
McGrath, Elizabeth J.
Mobasher, Bahram
Pérez González, Pablo G.
Pforr, Janine
Primack, Joel R.
SANTINI, Paola 
Stefanon, Mauro
Trump, Jonathan R.
VAN DER WEL, ARJEN
Wuyts, Stijn
Yan, Haojing
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 846
Issue: 2
First Page: 112
Abstract: We examine the fraction of massive ({M}<SUB>* </SUB>> {10}<SUP>10</SUP> {M}<SUB>☉ </SUB>) compact star-forming galaxies (cSFGs) that host an active galactic nucleus (AGN) at z̃ 2. These cSFGs are likely the direct progenitors of the compact quiescent galaxies observed at this epoch, which are the first population of passive galaxies to appear in large numbers in the early Universe. We identify cSFGs that host an AGN using a combination of Hubble WFC3 imaging and Chandra X-ray observations in four fields: the Chandra Deep Fields, the Extended Groth Strip, and the UKIDSS Ultra Deep Survey field. We find that {39.2}<SUB>-3.6</SUB><SUP>+3.9</SUP> % (65/166) of cSFGs at 1.4< z< 3.0 host an X-ray detected AGN. This fraction is 3.2 times higher than the incidence of AGN in extended star-forming galaxies with similar masses at these redshifts. This difference is significant at the 6.2σ level. Our results are consistent with models in which cSFGs are formed through a dissipative contraction that triggers a compact starburst and concurrent growth of the central black hole. We also discuss our findings in the context of cosmological galaxy evolution simulations that require feedback energy to rapidly quench cSFGs. We show that the AGN fraction peaks precisely where energy injection is needed to reproduce the decline in the number density of cSFGs with redshift. Our results suggest that the first abundant population of massive quenched galaxies emerged directly following a phase of elevated supermassive black hole growth and further hints at a possible connection between AGN and the rapid quenching of star formation in these galaxies.
URI: http://hdl.handle.net/20.500.12386/30165
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aa8566
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aa8566
Bibcode ADS: 2017ApJ...846..112K
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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