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Coevolution (or not) of supermassive black holes and host galaxies: Black hole scaling relations are not biased by selection effects

Published online by Cambridge University Press:  14 May 2020

John Kormendy*
Affiliation:
Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching by Munich, Germany Munich University Observatory, Scheinerstrasse 1, D-81679 Munich, Germany Department of Astronomy, University of Texas at Austin, 2515 Speedway, Mail Stop C1400, Austin, TX78712-1205, USA email: kormendy@astro.as.utexas.edu
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Abstract

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The oral version of this paper summarized Kormendy & Ho 2013, ARA&A, 51, 511. However, earlier speakers at this Symposium worried that selection effects bias the derivation of black hole scaling relations. I therefore added – and this proceedings paper emphasizes – a discussion of why we can be confident that selection effects do not bias the observed correlations between BH mass M and the luminosity, stellar mass, and velocity dispersion of host ellipticals and classical bulges. These are the only galaxy components that show tight BH-host correlations. The scatter plots of M with host properties for pseudobulges and disks are upper envelopes of scatter that does extend to lower BH masses. BH correlations are most consistent with a picture in which BHs coevolve only with classical bulges and ellipticals. Four physical regimes of coevolution (or not) are suggested by Kormendy & Ho 2013 and are summarized here.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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