Spectral models of bursting neutron stars

Physics

Scientific paper

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X-Ray Sources, X-Ray Bursts, Radiation Mechanisms, Polarization, Neutron Stars

Scientific paper

We calculate self-consistent model atmospheres of bursting neutron stars. It is found that for effective temperatures θe≡kT/mc2~0.1, the equilibrium density of e--e+ pairs in the atmosphere is one to few hundred times larger than the proton density. However, the effect of photon production by pair annihilations on the emergent spectrum is only marginal. For θe<~0.1, this spectrum is roughly described by a black body with reduced intensity due to the increased Thomson optical depth of the e--e+ pairs.

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