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http://hdl.handle.net/20.500.12386/29497
Titolo: | The infrared-luminous progenitors of high-z quasars | Autori: | Ginolfi, M. Schneider, R. VALIANTE, ROSA Pezzulli, E. Graziani, L. Fujimoto, S. Maiolino, R. |
Data pubblicazione: | 2019 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 483 | Fascicolo: | 1 | Da pagina:: | 1256 | Abstract: | Here we explore the infrared (IR) properties of the progenitors of high-z quasar host galaxies. Adopting the cosmological, data-constrained semi-analytic model GAMETE/QSOdust, we simulate several independent merger histories of a luminous quasar at z ∼ 6, following black hole growth and baryonic evolution in all its progenitor galaxies. We find that a fraction of progenitor galaxies (about 0.4 objects per single luminous quasar) at 6.5 < z < 8 has an IR luminosity of L<SUB>IR</SUB> > 10<SUP>13</SUP> L<SUB>☉</SUB> (hyper-luminous IR galaxies; HyLIRGs). HyLIRGs progenitors reside in the most massive haloes, with dark matter (DM) masses of M<SUB>DM</SUB> ∼ 10<SUP>12.5</SUP>-10<SUP>13 </SUP> M<SUB>☉</SUB>. These systems can be easily observed in their ∼1 mm-continuum emission in a few seconds of integration time with the Atacama Large Millimeter/submillimeter Array, and at least 40 per cent of them host nuclear black hole activity that is potentially observable in the soft and hard X-ray band. Our findings are in line with recent observations of exceptional massive DM haloes hosting HyLIRGs at z ∼ 7, suggesting that z ∼ 6 luminous quasars are indeed the signposts of these observed rare peaks in the high-z cosmic density field, and that massive IR-luminous galaxies at higher z are their natural ancestors. | URI: | http://hdl.handle.net/20.500.12386/29497 | URL: | https://academic.oup.com/mnras/article-abstract/483/1/1256/5211082 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/sty3205 | Bibcode ADS: | 2019MNRAS.483.1256G | Fulltext: | open |
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