Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimates of black-hole natal kick velocities from observations of
  low-mass X-ray binaries   The birth kicks of black holes, arising from asymmetric mass ejection or
neutrino emission during core-collapse supernovae, are of great interest for
both observationally constraining supernova models and population-synthesis
studies of binary evolution. Recently, several efforts were undertaken to
estimate black hole birth kicks from observations of black-hole low-mass X-ray
binaries. We follow up on this work, specifically focussing on the highest
estimated black-hole kick velocities. We find that existing observations do not
require black hole birth kicks in excess of approximately 100 km/s, although
higher kicks are not ruled out.

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The categories of this paper are: q-alg
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg