Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolutionary Channels for the Formation of Double Neutron Stars   We analyze binary population models of double-neutron stars and compare
results to the accurately measured orbital periods and eccentricities of the
eight known such systems in our Galaxy. In contrast to past similar studies, we
especially focus on the dominant evolutionary channels (we identify three); for
the first time, we use a detailed understanding of the evolutionary history of
three double neutron stars as actual constraints on the population models. We
find that the evolutionary constraints derived from the double pulsar are
particularly tight, and less than half of the examined models survive the full
set of constraints. The top-likelihood surviving models yield constraints on
the key binary evolution parameters, but most interestingly reveal (i) the need
for electron-capture supernovae from relatively low-mass degenerate, progenitor
cores, and (ii) the most likely evolutionary paths for the rest of the known
double neutron stars. In particular, we find that J1913+16 likely went through
a phase of Case BB mass transfer, and J1906+0746 and J1756-2251 are consistent
with having been formed in electron-capture supernovae.

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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
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The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int