The Coexistence of Classical Bulges, Pseudobulges, and Supermassive Black Holes

Details The Coexistence of Classical Bulges, Pseudobulges, and Supermassive Black Holes The Coexistence of Classical Bulges, Pseudobulges, and Supermassive Black Holes

2010-02-07

arxiv.org/abs/1002.1445v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

LaTeX, 4 pages, 2 PDF figures. To appear in the proceedings of "The Monster's Fiery Breath: Feedback in Galaxies, Groups, and

Scientific paper

Some S0 and early-type spiral galaxies possess "composite bulges"; in these galaxies, the photometric bulge -- the central stellar light in excess of the disk light -- is composed of both a "(disky) pseudobulge", with a flattened, disklike morphology and relatively cool stellar kinematics, and a rounder, kinematically hot "classical bulge" embedded within. I speculate that supermassive black holes (SMBH) in such galaxies may correlate with the classical-bulge component only, and not with the pseudobulge component; preliminary comparisons with SMBH masses appear to support this hypothesis.

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