Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Binary neutron star mergers in fully general relativistic simulations   We perform 3D numerical simulations for merger of equal mass binary neutron
stars in full general relativity preparing irrotational binary neutron stars in
a quasiequilibrium state as initial conditions. Simulations have been carried
out for a wide range of stiffness of equations of state and compactness of
neutron stars, paying particular attention to the final products and
gravitational waves. We take a fixed uniform grid in Cartesian coordinates with
typical grid size $(293,293,147)$ in $(x,y,z)$ assuming a plane symmetry with
respect to the equatorial plane. A result of one new large-scale simulation
performed with grid size $(505,505,253)$ is also presented.
  We find that the final product depends sensitively on the initial compactness
of the neutron stars: In a merger between sufficiently compact neutron stars, a
black hole is formed in a dynamical timescale. As the compactness is decreased,
the formation timescale becomes longer and longer. For less compact cases, a
differentially rotating massive neutron star is formed instead of a black hole.
In the case of black hole formation, the disk mass around the black hole
appears to be smaller than 1% of the total rest mass. It is also indicated that
waveforms of high-frequency gravitational waves after merger depend strongly on
the compactness of neutron stars.

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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph