Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamically formed black hole+millisecond pulsar binaries in globular
  clusters   The discovery of a binary comprising a black hole (BH) and a millisecond
pulsar (MSP) would yield insights into stellar evolution and facilitate
exquisitely sensitive tests of general relativity. Globular clusters (GCs) are
known to harbor large MSP populations and recent studies suggest that GCs may
also retain a substantial population of stellar mass BHs. We modeled the
formation of BH+MSP binaries in GCs through exchange interactions between
binary and single stars. We found that in dense, massive clusters most of the
dynamically formed BH+MSP binaries will have orbital periods of 2 to 10 days,
regardless of the mass of the BH, the number of BHs retained by the cluster,
and the nature of the GC's binary population. The size of the BH+MSP population
is sensitive to several uncertain parameters, including the BH mass function,
the BH retention fraction, and the binary fraction in GCs. Based on our models,
we estimate that there are $0.6\pm0.2$ dynamically formed BH+MSP binaries in
the Milky Way GC system, and place an upper limit on the size of this
population of $\sim 10$. Interestingly, we find that BH+MSP binaries will be
rare even if GCs retain large BH populations.

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The categories of this paper are: cond-mat
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci