期刊
ASTRONOMICAL JOURNAL
卷 137, 期 6, 页码 4716-4717出版社
IOP Publishing Ltd
DOI: 10.1088/0004-6256/137/6/4716
关键词
galaxies: fundamental parameters; galaxies: spiral; galaxies: structure
Seigar et al. have recently demonstrated a new, tight correlation between galactic central supermassive black hole (BH) mass and the pitch angle of the spiral arm in disk galaxies which they attribute to other indirect correlations. They fit a double power law, governed by five parameters, to the BH mass as a function of pitch. Noting the features of their fitted curve, we show that a simple linear proportion of the BH mass to the cotangent of the pitch angle can obtain the same fit, within error. Such a direct, elegant fit may help shed light on the nature of the correlation.
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