Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic Origin of Black Hole Winds Across the Mass Scale   Black hole accretion disks appear to produce invariably plasma outflows that
result in blue-shifted absorption features in their spectra. The X-ray
absorption-line properties of these outflows are quite diverse, ranging in
velocity from non-relativistic ($\sim 300$ km/sec) to sub-relativistic ($\sim
0.1c$ where $c$ is the speed of light) and a similarly broad range in the
ionization states of the wind plasma. We report here that semi-analytic,
self-similar magnetohydrodynamic (MHD) wind models that have successfully
accounted for the X-ray absorber properties of supermassive black holes, also
fit well the high-resolution X-ray spectrum of the accreting stellar-mass black
hole, GRO J1655-40. This provides an explicit theoretical argument of their MHD
origin (aligned with earlier observational claims) and supports the notion of a
universal magnetic structure of the observed winds across all known black hole
sizes.

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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: stat