Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical Formation of Close Binary Systems in Globular Clusters   We know from observations that globular clusters are very efficient catalysts
in forming unusual short-period binary systems or their offspring, such as
low-mass X-ray binaries (LMXBs; neutron stars accreting matter from low-mass
stellar companions), cataclysmic variables (CVs; white dwarfs accreting matter
from stellar companions), and millisecond pulsars (MSPs; rotating neutron stars
with spin periods of a few ms). Although there has been little direct evidence,
the overabundance of these objects in globular clusters has been attributed by
numerous authors to the high densities in the cores, which leads to an increase
in the formation rate of exotic binary systems through close stellar
encounters. Many such close binary systems emit X-radiation at low luminosities
(L_x < 10^{34} erg/s) and are being found in large numbers through observations
with the Chandra X-ray Observatory. Here we present conclusive observational
evidence for a link between the number of close binaries observed in X-rays in
a globular cluster and the stellar encounter rate of the cluster. We also make
an estimate of the total number of LMXBs in globular clusters in our Galaxy.

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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: cs