Simple Fit of Data Relating Supermassive Black Hole Mass to Galaxy Pitch Angle

Details Simple Fit of Data Relating Supermassive Black Hole Mass to Galaxy Pitch Angle Simple Fit of Data Relating Supermassive Black Hole Mass to Galaxy Pitch Angle

2009-04-24

arxiv.org/abs/0904.3901v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

2 pages, 1 fig

Scientific paper

10.1088/0004-6256/137/6/4716

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 disc 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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