Supermassive Black Holes in Low-Mass Bulges, Pseudobulges, and Composite Bulges
Abstract
We report direct dynamical measurements of supermassive black hole masses in nearby S0 and spiral galaxies, including systems with classical bulges, pseudobulges, and composite systems which host both disky pseudobulges and classical bulges. The primary data used are stellar kinematics obtained with the SINFONI near-IR IFU on the VLT in adaptive-optics mode (using both natural and laser guide stars), with resolutions down to 0.08 arcsec FWHM. We treat the galaxies as multi-component systems, using careful decompositions to separate out stellar components (e.g., nuclear star clusters, bulges, pseudobulges, disks) which can take on different M/L ratios in the modeling process. Using Schwarzschild modeling, we obtain central black hole masses for nine galaxies and upper limits for two more. We will comment on possible relations between the black hole masses and the characteristics of the host galaxies, including bulge versus pseudobulge components for composite-bulge galaxies.
- Publication:
-
American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22330905E