Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Microquasars and ULXs: Fossils of GRB Sources   Gamma-ray bursts (GRBs) of long duration probably result from the
core-collapse of massive stars in binary systems. After the collapse of the
primary star the binary system may remain bound leaving a microquasar or ULX
source as remnant. In this context, microquasars and ULXs are fossils of GRB
sources and should contain physical and astrophysical clues on GRB-source
progenitors. The identification of the birth place of microquasars and
magnetars can provide constrains on the progenitor stars of the compact
objects, and the runaway velocities can be used to constrain the energy in the
explosion of massive stars that leave neutron stars and black holes. The
observations show that the neutron star binaries LS 5039, LSI +61 303 and the
low-mass black hole in GRO J1655-40 formed in energetic supernova explosions,
whereas the black holes of larger masses (M > 10 Msolar) in Cygnus X-1 and GRS
1915+105 formed promptly or in underluminous supernovae. If the massive star
formation in the parent clusters of the microquasar LSI +61 303 and magnetars
SGR 1806-20 and SGR 1900+14 was coeval, very massive stars (M > 50 Msolar) may
in some cases leave neutron stars rather than black holes. The models of GRB
sources of long duration have the same basic ingredients as microquasars and
ULXs: compact objects with accretion disks and relativistic jets in binary
systems. Therefore, the analogies between microquasars and AGN may be extended
to the sources of GRBs.

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The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: math