Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron stars in Microquasars   We discuss the "basic" condition for an accreting neutron star to become a
microquasar, i.e. ejecting relativistic particles orthogonal to the accretion
disk instead of confining disk-material down to the magnetic poles and creating
the two emitting caps typical for a X-ray pulsar. Jet creation is prevented for
B >/= 10^12 G independent of the accretion rate. This excludes the possibility
for a classic X-ray pulsar to develop a "microquasar-phase" and is consistent
with the lack of radio emission from such pulsar systems. Millisecond
accretion-powered pulsars, on the contrary, may show a "microquasar-phase",
where B < 10^7.5 G is valid, whereas the limit for Z sources is B < 10^8.2 G.
The implication of our analysis is that the jet might be the suitable agent of
angular momentum sink for millisecond accretion-powered pulsars.

18
The categories of this paper are: econ
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: eess