Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Mass Ratio Distribution of Black Hole Mergers in Triple Systems   Observations have shown that the majority of massive stars, progenitors of
black holes (BHs), have on average more than one stellar companion. In triple
systems, wide inner binaries can be driven to a merger by the third body due to
long-term secular interactions (the eccentric Lidov-Kozai effect). In this
Letter, we explore the properties of BH mergers in triple systems and compare
their population properties to those of binaries produced in isolation and
assembled in dense star clusters. Using the same stellar physics and identical
assumptions for the initial populations of binaries and triples, we show that
stellar triples yield a significantly flatter mass ratio distribution from
$q=1$ down to $q\sim0.3$ than either binary stars or dense stellar clusters,
similar to the population properties inferred from the most recent catalog of
gravitational-wave events. While hierarchical mergers in clusters can also
produce asymmetric mass ratios, the unique spins of such mergers can be used to
distinguished them from those produced from stellar triples. All three channels
occupy distinct regions in total mass-mass ratio space, which may allow them to
be disentangled as more BH mergers are detected by LIGO, Virgo, and KAGRA.

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The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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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: acc-phys
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The categories of this paper are: nlin
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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: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph