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3D numerical study of an anisotropic heat transfer in outer layers of magnetized neutron stars

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dc.contributor.authorKondratyev, I. A.
dc.contributor.authorMoiseenko, S. G.
dc.contributor.authorGlushikhina, M. V.
dc.contributor.authorBisnovatyi-Kogan, G. S.
dc.contributor.authorБисноватый-Коган, Геннадий Семенович
dc.date.accessioned2024-11-21T18:10:40Z
dc.date.available2024-11-21T18:10:40Z
dc.date.issued2019
dc.description.abstract© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).Periodic changes in a thermal soft X-ray flux of a rotating neutron star indicate a non-uniform distribution of the surface temperature. A possible cause of this phenomenon is a suppression of the heat flux across the magnetic field lines in a crust and an envelope of magnetized neutron stars. In this paper we study three-dimensional effects, associated with non-axisymmetric magnetic fields in neutron stars. We calculate the surface temperature distribution by solving numerically a three dimensional heat transfer equation in a magnetized neutron star crust. We adopt an anisotropic (tensorial) electron thermal conductivity coefficient, which is derived as an analytical solution of the Boltzmann equation with a Chapman-Enskog method. To calculate the surface temperature distribution, we construct a local one-dimensional plane-parallel model ("Ts-Tb"-relationship) of a magnetized neutron star envelope. We then use it as an outer boundary condition for the three-dimensional problem in the crust to find the self-consistent solution. To study possible observational manifestations from anisotropic temperature distributions we calculate light curves with a composite black-body model. Our calculations show, that a non-axisymmetric magnetic field distribution can lead to the irregular non-sinusoidal shape of a pulse profile as well as in some cases a significant amplification of pulsations of the thermal flux in comparison to the pure-dipolar magnetic field configurations.
dc.identifier.citation3D numerical study of an anisotropic heat transfer in outer layers of magnetized neutron stars / Kondratyev, I.A. [et al.] // Proceedings of Science. - 2019. - 354
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85081125888&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/19470
dc.relation.ispartofProceedings of Science
dc.title3D numerical study of an anisotropic heat transfer in outer layers of magnetized neutron stars
dc.typeConference Paper
dspace.entity.typePublication
oaire.citation.volume354
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relation.isAuthorOfPublication.latestForDiscovery8207cbb5-6929-4b61-a959-03839711b81e
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