Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral energy distribution of the gamma-ray microquasar LS 5039   The microquasar LS 5039 has recently been detected as a source of very high
energy (VHE) $\gamma$-rays. This detection, that confirms the previously
proposed association of LS 5039 with the EGRET source 3EG~J1824$-$1514, makes
of LS 5039 a special system with observational data covering nearly all the
electromagnetic spectrum. In order to reproduce the observed spectrum of LS
5039, from radio to VHE $\gamma$-rays, we have applied a cold matter dominated
jet model that takes into account accretion variability, the jet magnetic
field, particle acceleration, adiabatic and radiative losses, microscopic
energy conservation in the jet, and pair creation and absorption due to the
external photon fields, as well as the emission from the first generation of
secondaries. The radiative processes taken into account are synchrotron,
relativistic Bremsstrahlung and inverse Compton (IC). The model is based on a
scenario that has been characterized with recent observational results,
concerning the orbital parameters, the orbital variability at X-rays and the
nature of the compact object. The computed spectral energy distribution (SED)
shows a good agreement with the available observational data.

2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
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: cond-mat
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The categories of this paper are: quant-ph