Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TYC~2990-127-1: an Algol-type SB2 binary system of subgiant and red
  giant with a probable ongoing mass-transfer   We present a study of the spectroscopic binary TYC 2990-127-1 from the LAMOST
survey. We use full-spectrum fitting to derive radial velocities and spectral
parameters. The high mass ratio indicates that the system underwent mass
transfer in the past. We compute the orbital solution and find that it is a
very close sub-giant/red giant pair on circular orbit, slightly inclined to the
sky-plane. Fitting of the TESS photometrical data confirms this and suggests an
inclination of i \sim 39.8 deg. The light curve and spectrum around H_alpha
show signs of irregular variability, which supports ongoing mass transfer. The
binary evolution simulations suggest that the binary may experience
non-conservative mass transfer with accretion efficiency 0.3, and the binary
will enter into common envelope phase in the subsequent evolution. The remnant
product after the ejection of common envelope may be a detached double helium
white dwarf (He WD) or a merger.

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The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom