Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Possible Model for the Supernova/Gamma-Ray Burst Connection   Conversion from neutron stars to strange stars as a possible mechanism of
cosmological gamma-ray bursts (GRBs) has been discussed in previous works,
although the existence of strange stars is still an open question. On the basis
of this mechanism, we here outline an explanation of the connection between
supernovae (SNe) and GRBs, which has got increasing evidence recently. An
asymmetric but normal SN explosion leaves a massive ($\geq1.8{\rm M_\odot}$)
and rapidly rotating neutron star, which then converts to a strange star few
days later, due to its rapid spindown. The accompanied fireball, which can be
accelerated to ultra-relativistic velocity ($\Gamma_0\sim 100$) due to the very
low baryon contamination of the strange star, flows out along the direction of
the high-velocity SN jet and subsequently produces a GRB and the following low
energy afterglows by interacting with the surrounding stellar wind. We will
also expect a very luminous supernova like SN1998bw, if a large fraction of the
conversion energy finally turns into the kinetic energy of the supernova
ejecta.

1
The categories of this paper are: cs
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn