Affiliation:
1. School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
2. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Abstract
Abstract
The scaling relations between supermassive black holes and their host galaxy properties are of fundamental importance in the context black hole-host galaxy co-evolution throughout cosmic time. In this work, we use a novel algorithm that identifies smooth trends in complex data sets and apply it to a sample of 2000 type 1 active galactic nuclei (AGNs) spectra. We detect a sequence in emission line shapes and strengths which reveals a correlation between the narrow L([O iii])/L(H β) line ratio and the width of the broad H α. This scaling relation ties the kinematics of the gas clouds in the broad line region to the ionization state of the narrow line region, connecting the properties of gas clouds kiloparsecs away from the black hole to material gravitationally bound to it on sub-parsec scales. This relation can be used to estimate black hole masses from narrow emission lines only. It therefore enables black hole mass estimation for obscured type 2 AGNs and allows us to explore the connection between black holes and host galaxy properties for thousands of objects, well beyond the local Universe. Using this technique, we present the MBH–σ and MBH–M* scaling relations for a sample of about 10 000 type 2 AGNs from Sloan Digital Sky Survey. These relations are remarkably consistent with those observed for type 1 AGNs, suggesting that this new method may perform as reliably as the classical estimate used in non-obscured type 1 AGNs. These findings open a new window for studies of black hole-host galaxy co-evolution throughout cosmic time.
Funder
Alfred P. Sloan Foundation
National Science Foundation
U.S. Department of Energy
University of Arizona
Brookhaven National Laboratory
Carnegie Mellon University
University of Florida
Harvard University
Johns Hopkins University
Lawrence Berkeley National Laboratory
New Mexico State University
New York University
Ohio State University
Pennsylvania State University
University of Portsmouth
Princeton University
University of Tokyo
University of Utah
Vanderbilt University
University of Virginia
University of Washington
Yale University
Publisher
Oxford University Press (OUP)
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
37 articles.
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