Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searching for Black Hole Candidates by LAMOST and ASAS-SN   Most dynamically confirmed stellar-mass black holes and the candidates were
originally selected from X-ray outbursts. In the present work, we search for
black hole candidates in the LAMOST survey by using the spectra along with
photometry from the ASAS-SN survey, where the orbital period of the binary may
be revealed by the periodic light curve, such as the ellipsoidal modulation
type. Our sample consists of 9 binaries, where each source contains a giant
star with large radial velocity variation ($\Delta V_{\rm R} > 70~{\rm
km~s^{-1}}$) and periods known from light curves. We focus on the 9 sources
with long periods ($T_{\rm ph} > 5$ days) and evaluate the mass $M_2$ of the
optically invisible companion. Since the observed $\Delta V_{\rm R}$ from only
a few repeating spectroscopic observations is a lower limit of the real
amplitude, the real mass $M_2$ can be significantly higher than the current
evaluation. It is likely an efficient method to place constraints on $M_2$ by
combining $\Delta V_{\rm R}$ from LAMOST and $T_{\rm ph}$ from ASAS-SN,
particularly by the ongoing LAMOST Medium Resolution Survey.

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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
1
The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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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: physics