Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 506, Issue 3, Pages 4593-4602Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stab2077
Keywords
stars: atmospheres; stars: magnetic field; stars: neutron
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Funding
- Ministry of Science and Higher Education of the Russian Federation [14, W03.31.0021]
- Academy of Finland [316932, 332666]
- Academy of Finland (AKA) [316932, 332666, 316932, 332666] Funding Source: Academy of Finland (AKA)
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We studied a simple model describing thermal radiation spectra from magnetized neutron stars, finding that thermal spectra can be accurately approximated by a double blackbody model. Analysis of phase-space maps of 2BB parameters can be useful for interpreting neutron star observations.
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 less than or similar to 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.
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