Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray spectropolarimetric signature of a warped disk around a
  stellar-mass black hole   Black holes in X-ray binaries are often assumed to be rotating perpendicular
to the plane of the accretion disk and parallel to the orbital plane of the
binary. While the Bardeen-Petterson effect forces the inner part of the
accretion disk to be aligned with the equatorial plane of a spinning black
hole, the disk may be warped such that the inclination angle of the outer part
is different from that of the inner part. In this paper, we identify a possible
observational signature of a warped accretion disk in the spectrum of the
polarization degree of the continuum. Such a signature would provide direct
evidence for the presence of a warped disk and, potentially, even a measure of
the warp radius, which, in turn, could be used to infer the viscosity parameter
of the disk.

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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
1
The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin