Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic neutron star merger simulations with non-zero temperature
  equations of state I. Variation of binary parameters and equation of state   An extended set of binary neutron star (NS) merger simulations is performed
with an approximative conformally flat treatment of general relativity to
systematically investigate the influence of the nuclear equation of state
(EoS), the neutron star masses, and the NS spin states prior to merging. We
employ the two non-zero temperature EoSs of Shen et al. (1998a,b) and Lattimer
& Swesty (1991). In addition, we use the cold EoS of Akmal et al. (1998) with a
simple ideal-gas-like extension according to Shibata & Taniguchi (2006), and an
ideal-gas EoS with parameters fitted to the supernuclear part of the Shen-EoS.
We estimate the mass sitting in a dilute high-angular momentum ``torus'' around
the future black hole (BH). The dynamics and outcome of the models is found to
depend strongly on the EoS and on the binary parameters. Larger torus masses
are found for asymmetric systems (up to ~0.3 M_sun for a mass ratio of 0.55),
for large initial NSs, and for a NS spin state which corresponds to a larger
total angular momentum. We find that the postmerger remnant collapses either
immediately or after a short time when employing the soft EoS of Lattimer&
Swesty, whereas no sign of post-merging collapse is found within tens of
dynamical timescales for all other EoSs used. The typical temperatures in the
torus are found to be about 3-10 MeV depending on the strength of the shear
motion at the collision interface between the NSs and thus depending on the
initial NS spins. About 10^{-3}-10^{-2} M_sun of NS matter become
gravitationally unbound during or right after the merging process. This matter
consists of a hot/high-entropy component from the collision interface and (only
in case of asymmetric systems) of a cool/low-entropy component from the spiral
arm tips. (abridged)

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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg