Equation of state and opacities for hydrogen atmospheres of strongly magnetized cooling neutron stars
A. Y. Potekhin, Yu. A. Shibanov, J. Ventura
Abstract
We study partially ionized hydrogen plasma at temperatures T = 105.5-106.5 K and magnetic fields B = 1012-1013 G, typical of photospheres of isolated neutron stars. We construct an analytic model of the plasma free energy and derive a generalized Saha equation which is used to obtain the opacities.
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