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Stable, levitating, optically thin atmospheres of Eddington-luminosity neutron stars

Journal article
Authors M. Wielgus
W. Kluzniak
A. Sadowski
R. Narayan
Marek A Abramowicz
Published in Monthly Notices of the Royal Astronomical Society
Volume 454
Issue 4
Pages 3766-3770
ISSN 0035-8711
Publication year 2015
Published at Department of Physics (GU)
Pages 3766-3770
Language en
Keywords gravitation, relativistic processes, stars: atmospheres, stars: neutron, x-ray sources, capture, Astronomy & Astrophysics
Subject categories Astronomy, Astrophysics and Cosmology


In general relativity, static gaseous atmospheres may be in hydrostatic balance in the absence of a supporting stellar surface, provided that the luminosity is close to the Eddington value. We construct analytic models of optically thin, spherically symmetric shells supported by the radiation pressure of a luminous central body in the Schwarzschild metric. Opacity is assumed to be dominated by Thomson scattering. The inner parts of the atmospheres, where the luminosity locally has supercritical values, are characterized by a density and pressure inversion. The atmospheres are convectively and Rayleigh-Taylor stable, and there is no outflow of gas. RAMOWICZ MA, 1990, ASTROPHYSICAL JOURNAL, V361, P470

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