Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GRB emission in Neutron Star transitions   In this contribution we briefly introduce a mechanism for short gamma ray
burst emission different from the usually assumed compact object binary merger
progenitor model. It is based on the energy release in the central regions of
neutron stars. This energy injection may be due to internal self-annihilation
of dark matter gravitationally accreted from the galactic halo. We explain how
this effect may trigger its full or partial conversion into a quark star and,
in such a case, induce a gamma ray burst with isotropic equivalent energies in
agreement with those measured experimentally. Additionally, we show how the
ejection of the outer crust in such events may be accelerated enough to produce
Lorentz factors over those required for gamma ray emission.

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The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin