http://arxiv.org/abs/2107.10761
We study a simple model describing thermal radiation spectra from magnetized neutron stars. The model assumes that a star is nearly spherical and isothermal inside and possesses dipole magnetic fields ($B \lesssim 10^{14}$ G) near the surface, which make the surface temperature distribution non–uniform. We assume further that any surface element emits a blackbody (BB) spectrum with a local effective temperature. We show that such thermal spectra (including phase–resolved) are accurately approximated by simple equivalent two–BB (2BB) models. We introduce and study phase–space maps of 2BB parameters and show that these maps can be useful for interpreting neutron star observations, in which 2BB spectral fits have been done.
D. Yakovlev
Fri, 23 Jul 21
18/63
Comments: 10 pages, 8 figures, MNRAS, accepted
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