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Outflows & Feedback from Extremely Red Quasars

Published online by Cambridge University Press:  29 March 2021

Fred Hamann Open the ORCID record for Fred Hamann [Opens in a new window] ,
Serena Perrotta  and
Nadia Zakamska
Fred Hamann
Affiliation:
Department of Physics & Astronomy, University of California, Riverside,900 University Ave., Riverside, CA 92521, USA email: fhamann@ucr.edu
Serena Perrotta
Affiliation:
Center for Astrophysics & Space Sciences, University of California, San Deigo, 9500 Gilman Drive, La Jolla, CA 92093, USA email: s2perrotta@ucsd.edu
Nadia Zakamska
Affiliation:
Department of Physics & Astronomy, Johns Hopkins University, 3400 N. Charles Street Baltimore, MD 21218, USA email: zakamska@jhu.edu
Rights & Permissions [Opens in a new window]

Abstract

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Feedback from accreting supermassive black holes is often invoked in galaxy evolution models to inhibit star formation, truncate galaxy growth, and establish the observed black-hole/bulge mass correlation. We are studying outflows and feedback in a unique sample of extremely red quasars (ERQs) during the peak epoch of galaxy formation (at redshifts 2.3 < z < 3.4). We identified ERQs in the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey (BOSS) quasar catalog based on their extremely red i–W3 colors, but we find that ERQs typically have a suite of other extreme properties including 1) a high incidence of blueshifted broad absorption lines, 2) broad emission lines with unusually large rest equivalent widths (REWs), peculiar “wingless” profiles, and frequent large blueshifts (reaching ˜8740 km s-1), and 3) characteristically very broad and blueshifted [OIII] 4959,5007Å lines that trace ionized outflows at speeds up to ˜6700 km s-1. We propose that these ERQs represent a young quasar population with powerful outflows on the precipice of causing important disruptive feedback effects in their host galaxies.

Keywords

galaxies: evolutionquasars: emission linesquasars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 232 - 237
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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