Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numeric simulation of relativistic stellar core collapse and the
  formation of Reissner-Nordstrom space-times   The time evolution of a set of 22 Mo unstable charged stars that collapse is
computed integrating the Einstein-Maxwell equations. The model simulate the
collapse of an spherical star that had exhausted its nuclear fuel and have or
acquires a net electric charge in its core while collapsing. When the charge to
mass ratio is Q/M >= 1 the star do not collapse and spreads. On the other hand,
it is observed a different physical behavior with a charge to mass ratio 1 > Q/
M > 0.1. In this case, the collapsing matter forms a bubble enclosing a lower
density core. We discuss an immediate astrophysical consequence of these
results that is a more efficient neutrino trapping during the stellar collapse
and an alternative mechanism for powerful supernova explosions. The outer
space-time of the star is the Reissner-Nordstrom solution that match smoothly
with our interior numerical solution, thus the collapsing models forms
Reissner-Nordstrom black holes.

32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
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The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci