Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of nuclear stars gravity on quasar radiation feedback on the
  parsec-scale   It is often suggested that a super massive black hole is embedded in a
nuclear bulge of size of a few $10^2$ $\text{ parsec}$ . The nuclear stars
gravity is not negligible near $\sim 10 \text{ parsec}$. In order to study the
effect of nuclear stars gravity on quasar radiation feedback on the parsec
scale, we have simulated the parsec scale flows irradiated by a quasar by
taking into account the gravitational potential of both the black hole and the
nuclear star cluster. We find that the effect of nuclear stars gravity on the
parsec-scale flows is related to the fraction of X-ray photons in quasar
radiation. For the models in which the fraction of X-ray photons is not small
(e.g. the X-ray photons contribute to $20\%$ of the quasar radiation), the
nuclear stars gravity is very helpful to collimate the outflows driven by UV
photons, significantly weakens the outflow power at the outer boundary and
significantly enhances the net accretion rate onto the black hole. For the
models in which X-ray photons are significantly decreased (e.g. the X-ray
photons contribute to $5\%$ of the quasar radiation), the nuclear stars gravity
can just slightly change properties of outflow and slightly enhance the net
accretion rate onto the black hole.

14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an