Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quenching black hole accretion by active galactic nuclei feedback   Observations of many dim galactic nuclei in local universe give good
estimation of gas density and temperature at Bondi radius. If we assume the
black hole accretes at Bondi accretion rate and radiates at efficiency of
low-luminosity hot accretion flow, the predicted nuclei luminosity can be
significantly higher than observations. Therefore, the real black hole mass
accretion rate in these sources may be significantly smaller than the Bondi
value. Active galactic nuclei (AGN) feedback may be responsible for decreasing
black hole accretion rate to values much smaller than Bondi rate. We perform
two-dimensional simulations of low angular momentum accretion flow at parsec
and sub-parsec scales around low-luminosity active galactic nuclei (LLAGNs). We
take into account the radiation and wind feedbacks of the LLAGN. The cross
section of particle-particle interaction can be several orders of magnitude
larger than that of photon-particle interaction. Therefore, we find that for
the LLAGNs, effects of radiation feedback in decreasing black hole accretion
rate are small. However, wind feedback can effectively decrease the black hole
mass accretion rate. Due to the decrease of accretion rate, the black hole
luminosity can be decreased by a factor of $\sim 33-400$. The results may be
useful to explain why many galactic nuclei in the local universe are so dim.

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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol