Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unbound Close Stellar Encounters in the Solar Neighborhood   We present a catalog of unbound stellar pairs, within 100 pc of the Sun, that
are undergoing close, hyperbolic, encounters. The data are drawn from the GAIA
EDR3 catalogue, and the limiting factors are errors in the radial distance and
unknown velocities along the line of sight. Such stellar pairs have been
suggested (Hansen & Zuckerman 2021) to be possible events associated with the
migration of technological civilisations between stars. As such, this sample
may represent a finite set of targets for a SETI search based on this
hypothesis.
  Our catalog contains a total of 132 close passage events, featuring stars
from across the entire main sequence, with 16 pairs featuring at least one main
sequence star of spectral type between K1 and F3.
  Many of these stars are also in binaries, so that we isolate eight single
stars as the most likely candidates to search for an ongoing migration event --
HD 87978, HD 92577, HD 50669, HD 44006, HD 80790, LSPM J2126+5338, LSPM
J0646+1829 and HD 192486.
  Amongst host stars of known planets, the stars GJ 433 and HR 858 are the best
candidates.

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The categories of this paper are: math
3
The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat