Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Potential Recoiling Supermassive Black Hole CXO J101527.2+625911   We have carried out a systematic search for recoiling supermassive black
holes (rSMBH) using the Chandra Source and SDSS Cross Matched Catalog. From the
survey, we have detected a potential rSMBH, 'CXO J101527.2+625911' at z=0.3504.
The CXO J101527.2+625911 has a spatially offset (1.26$\pm$0.05 kpc) active SMBH
and kinematically offset broad emission lines (175$\pm$25 km s$^{\rm -1}$
relative to systemic velocity). The observed spatial and velocity offsets
suggest this galaxy could be a rSMBH, but we also have considered a possibility
of dual SMBH scenario. The column density towards the galaxy center was found
to be Compton thin, but no X-ray source was detected. The non-detection of the
X-ray source in the nucleus suggests either there is no obscured actively
accreting SMBH, or there exists an SMBH but has a low accretion rate (i.e.
low-luminosity AGN (LLAGN)). The possibility of the LLAGN was investigated and
found to be unlikely based on the H$\alpha$ luminosity, radio power, and
kinematic arguments. This, along with the null detection of X-ray source in the
nucleus supports our hypothesis that the CXO J101527.2+625911 is a rSMBH. Our
GALFIT analysis shows the host galaxy to be a bulge-dominated elliptical. The
weak morphological disturbance and small spatial and velocity offsets suggest
that CXO J101527.2+625911 could be in the final stage of merging process and
about to turn into a normal elliptical galaxy.

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The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
3
The categories of this paper are: physics