Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure of pair winds from compact objects with application to
  emission from hot bare strange stars   We consider a stationary, spherically outflowing wind consisting of
electron-positron pairs and photons. We do not assume thermal equilibrium, and
include the two-body processes that occur in such a wind: Moller and Bhaba
scattering of pairs, Compton scattering, two-photon pair annihilation, and
two-photon pair production, together with their radiative three-body variants:
bremsstrahlung, double Compton scattering, and three-photon pair annihilation,
with their inverse processes. In the concrete example described here, the wind
injection source is a hot, bare, strange star. Such stars are thought to be
powerful sources of pairs created by the Coulomb barrier at the quark surface.
We present a new, finite-difference scheme for solving the relativistic kinetic
Boltzmann equations for pairs and photons. Using this method we study the
kinetics of the wind particles and the emerging emission for total luminosities
of L=10^{34}-10^{42} ergs/s. We find the rates of particle number and energy
outflows, outflow velocities, number densities, energy spectra, and other
parameters for both photons and pairs as functions of the distance. We find
that for L>2x10^{35} ergs/s, photons dominate the emerging emission. As L
increases from ~ 10^{34} to 10^{42} ergs/s, the mean energy of emergent photons
decreases from ~400-500 keV to 40 keV, as the spectrum changes in shape from
that of a wide annihilation line to nearly a blackbody spectrum with a high
energy (> 100 keV) tail. These results are pertinent to the deduction of the
outside appearance of hot bare strange stars, which might help discern them
from neutron stars.

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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an