Strangeon star atmosphere model.
The strangeon star atmosphere (ssa) model describes the radiation from
interstellar medium accreted plasma atmosphere on a strangeon star
surface and its spectrum. The ssa could simply be regarded as the
upper layer of a normal neutron star because the radiation from
strangeon matter can be neglected (Wang et al. 2017, 1705.03763). The atmosphere
is in radiative, thermal equilibrium and two-temperature. The ssa
spectrum is based on bremsstrahlung from an extremely thin hydrogen
plasma. More details of the ssa model are described in Wang et al.
(2017, ApJ, 837, 81).
Keith Arnaud, Lab. for High Energy Astrophysics, NASA/Goddard Space Flight Center
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