John Kormendy investigates the structure of galaxies and their central supermassive black holes. His 2013 review with Luis C. Ho examines black hole mass measurements inferred from spatially resolved motion and their correlations with different components of the host galaxy.
An important distinction is between a galactic bulge, a galactic disk and a pseudobulge: the authors find that the same simple coevolution story does not describe all three. A correlation such as the M-sigma relation is therefore evidence to interpret in its structural context, rather than a universal description of every galaxy.[ref]
Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies by John Kormendy and Luis C. Ho. Abstract: spatially resolved kinematics, bulge velocity dispersion and different correlations for disks and pseudobulges
Portrait of John Kormendy
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