1. FURTHER EVIDENCE FOR A SUPERMASSIVE BLACK HOLE MASS–PITCH ANGLE RELATION.
- Author
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BERRIER, JOEL C., DAVIS, BENJAMIN L., KENNEFICK, DANIEL, KENNEFICK, JULIA D., SEIGAR, MARC S., SCOTT BARROWS, ROBERT, HARTLEY, MATTHEW, SHIELDS, DOUG, BENTZ, MISTY C., and LACY, CLAUD H. S.
- Subjects
SUPERMASSIVE black holes ,PROTOPLANETARY disks ,GALACTIC dynamics ,DENSITY wave theory ,GALACTIC nuclei - Abstract
We present new and stronger evidence for a previously reported relationship between galactic spiral arm pitch angle P (a measure of the tightness of spiral structure) and the mass MBH of a disk galaxy’s nuclear supermassive blackhole (SMBH). We use an improved method to accurately measure the spiral arm pitch angle in disk galaxies togenerate quantitative data on this morphological feature for 34 galaxies with directly measured black hole masses. We find a relation of log(M/M⊙) = (8.21±0.16)−(0.062±0.009)P. This method is compared with other meansof estimating black hole mass to determine its effectiveness and usefulness relative to other existing relations. We argue that such a relationship is predicted by leading theories of spiral structure in disk galaxies, including the density wave theory. We propose this relationship as a tool for estimating SMBH masses in disk galaxies. This tool is potentially superior when compared to other methods for this class of galaxy and has the advantage of being unambiguously measurable from imaging data alone. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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