Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simple Fit of Data Relating Supermassive Black Hole Mass to Galaxy Pitch
  Angle   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.

33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
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The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat