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Quasar black hole masses and accretion rates across cosmic time

Published online by Cambridge University Press:  29 March 2021

Michael Brotherton Open the ORCID record for Michael Brotherton [Opens in a new window] ,
Jaya Maithil ,
Adam Myers ,
Ohad Shemmer ,
Brandon Matthews ,
Cooper Dix ,
Pu Du  and
Jian-Min Wang
Michael Brotherton
Affiliation:
Dept. of Physics & Astronomy, University of Wyoming, Laramie, WY 82071, USA email: mbrother@uwyo.edu
Jaya Maithil
Affiliation:
Dept. of Physics & Astronomy, University of Wyoming, Laramie, WY 82071, USA email: mbrother@uwyo.edu
Adam Myers
Affiliation:
Dept. of Physics & Astronomy, University of Wyoming, Laramie, WY 82071, USA email: mbrother@uwyo.edu
Ohad Shemmer
Affiliation:
Department of Physics, University of North Texas, Denton, TX 76203, USA
Brandon Matthews
Affiliation:
Department of Physics, University of North Texas, Denton, TX 76203, USA
Cooper Dix
Affiliation:
Department of Physics, University of North Texas, Denton, TX 76203, USA
Pu Du
Affiliation:
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People’s Republic of China
Jian-Min Wang
Affiliation:
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People’s Republic of China
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Abstract

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Quasar black hole masses are most commonly estimated using broad emission lines in single epoch spectra based on scaling relationships determined from reverberation mapping of small samples of low-redshift objects. Several effects have been identified requiring modifications to these scaling relationships, resulting in significant reductions of the black hole mass determinations at high redshift. Correcting these systematic biases is critical to understanding the relationships among black hole and host galaxy properties. We are completing a program using the Gemini North telescope, called the Gemini North Infrared Spectrograph (GNIRS) Distant Quasar Survey (DQS), that has produced rest-frame optical spectra of about 200 high-redshift quasars (z = 1.5–3.5). The GNIRS-DQS will produce new and improved ultraviolet-based black hole mass and accretion rate prescriptions, as well as new redshift prescriptions for velocity zero points of high-z quasars, necessary to measure feedback.

Keywords

quasars: generalquasars: emission lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 57 - 61
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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