Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gamma-Ray Bursts and Afterglows from Rotating Strange Stars and Neutron
  Stars   We here discuss a new model of $\gamma$-ray bursts (GRBs) based on
differentially rotating strange stars. Strange stars in this model and
differentially rotating neutron stars in the Klu\'zniak-Ruderman model can
produce extremely relativistic, variable fireballs required by GRBs and then
become millisecond pulsars. The effect of such pulsars on expansion of the
postburst fireballs through magnetic dipole radiation is studied. We show that
these two models can explain naturally not only various features of GRBs but
also light curves of afterglows.

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The categories of this paper are: eess
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph