Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Universal Nature of Accretion-induced Variability: The RMS-Flux
  Relation in an Accreting White Dwarf   We report the discovery of a linear relationship between the root-mean-square
(rms) variability amplitude and the mean flux in the accreting white dwarf
binary system MV Lyrae. Our lightcurve, obtained with the Kepler satellite,
spans 633 days with quasi-continuous 58.8 second cadence resolution. We show,
for the first time, how this cataclysmic variable displays linear rms-flux
relations similar to those observed in many other black hole binaries, neutron
star binaries and Active Galactic Nuclei. The phenomenological similarity
between the rms-flux relation observed here and in other X-ray binaries
suggests a common physical origin for the broad-band variability, independent
of source type, mass or size of the compact accretor. Furthermore, we infer the
viscosity parameter, alpha, and disk scale height, H/R, using two independent
methods. In both cases, both values are found to be uncomfortably high to be
accommodated by the disk instability model.

14
The categories of this paper are: math-ph
2
The categories of this paper are: math
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th