Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Outflows from Quasars and Ultraluminous X-ray Sources   Mass outflows from Eddington-limited accreting compact objects appear to be a
very widespread phenomenon. They may provide the soft excess observed in
quasars and ULXs, and imply that such objects have a major effect on their
surroundings. In particular they allow a simple parameter-free argument for the
M_BH-sigma relation for galaxies, and offer a straightforward interpretation of
the emission nebulae seen around ULXs.

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The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
18
The categories of this paper are: econ