Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Wind-Disk Self-Irradiation Model For Supercritical Accretion   Optical emission from actively accreting X-ray binaries is dominated by X-ray
reprocessing on the outer disk. In the regime of supercritical accretion,
strong radiation will power a massive wind that is optically thick and nearly
spherical, and will occult the central hard X-rays from irradiating the outer
disk. Instead, thermal emission from the wind will act as a new source of
irradiation. Here, we construct a self-irradiation model, in which the inner
disk (within the wind photosphere) is completely blocked by the wind, the
middle part (between the wind photosphere and scattersphere) is heated by the
wind directly, and the outer disk (beyond the wind scattersphere) is heated by
photons leaving the scattersphere. The model can adequately fit the UV/optical
SED of NGC 247 X-1, a candidate source with supercritical accretion, while the
standard irradiation model fails to produce a self-consistent result. The
best-fit parameters suggest that the source contains a stellar mass black hole
with an accretion rate roughly 100 times the critical value. Remarkably, the
UV/optical fitting predicts a wind photosphere that is well consistent with
X-ray measurements, although it is an extrapolation over 3 orders of magnitude
in wavelength. This implies that supercritical accretion does power a massive
wind and the UV/optical data are useful in constraining the wind structure.

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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs