Institute of Astronomy

Hot, Dust-Obscured Galaxies

SpeakerTalk DateTalk Series
Roberto Assef (Universidad Diego Portales)27 July 2018Institute of Astronomy Galaxies Discussion Group

Abstract

The WISE mission has discovered a rare population of high-redshift, hyper-luminous infrared galaxies, all with bolometric luminosities above log L_Bol/L_Sun > 13 , and many with log L_Bol/L_Sun > 14.
Selected by their extremely red mid-IR colors and shown to have very hot dust temperatures, these hot, dust-obscured galaxies, or Hot DOGs for short, are dominated by the emission of a highly
obscured, actively accreting supermassive black hole and may probe a key stage in galaxy evolution.
I will present the latest results of our ongoing research to understand the nature of these enigmatic objects with emphasis in results from our latest NIR spectroscopic campaigns, as well as on recent
results from ALMA observations on W2246-0526, the most luminous Hot DOG, that show this system is likely experiencing a multiple merger as well as significant AGN feedback.

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