A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots

A simple and well known model for thermal radiation spectra from a magnetized neutron star is further studied. The model assumes that the star is internally isothermal and possesses a dipole magnetic field (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display=&...

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Autor principal:	Dmitry Yakovlev
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	neutron stars radiation transfer magnetic fields Elementary particle physics QC793-793.5
Acceso en línea:	https://doaj.org/article/4bb8caa2cbc047549114b49d447128d3
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spelling	oai:doaj.org-article:4bb8caa2cbc047549114b49d447128d32021-11-25T19:09:23ZA Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots10.3390/universe71103952218-1997https://doaj.org/article/4bb8caa2cbc047549114b49d447128d32021-10-01T00:00:00Zhttps://www.mdpi.com/2218-1997/7/11/395https://doaj.org/toc/2218-1997A simple and well known model for thermal radiation spectra from a magnetized neutron star is further studied. The model assumes that the star is internally isothermal and possesses a dipole magnetic field (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>B</mi><mo>≲</mo><msup><mn>10</mn><mn>14</mn></msup></mrow></semantics></math></inline-formula> G) in the outer heat-insulating layer. The heat transport through this layer makes the surface temperature distribution anisotropic; any local surface element is assumed to emit a blackbody (BB) radiation with a local effective temperature. It is shown that this thermal emission is nearly independent of the chemical composition of insulating envelope (at the same taken averaged effective surface temperature). Adding a slight extra heating of magnetic poles allows one to be qualitatively consistent with observations of some isolated neutron stars.Dmitry YakovlevMDPI AGarticleneutron starsradiation transfermagnetic fieldsElementary particle physicsQC793-793.5ENUniverse, Vol 7, Iss 395, p 395 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	neutron stars radiation transfer magnetic fields Elementary particle physics QC793-793.5
spellingShingle	neutron stars radiation transfer magnetic fields Elementary particle physics QC793-793.5 Dmitry Yakovlev A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots
description	A simple and well known model for thermal radiation spectra from a magnetized neutron star is further studied. The model assumes that the star is internally isothermal and possesses a dipole magnetic field (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>B</mi><mo>≲</mo><msup><mn>10</mn><mn>14</mn></msup></mrow></semantics></math></inline-formula> G) in the outer heat-insulating layer. The heat transport through this layer makes the surface temperature distribution anisotropic; any local surface element is assumed to emit a blackbody (BB) radiation with a local effective temperature. It is shown that this thermal emission is nearly independent of the chemical composition of insulating envelope (at the same taken averaged effective surface temperature). Adding a slight extra heating of magnetic poles allows one to be qualitatively consistent with observations of some isolated neutron stars.
format	article
author	Dmitry Yakovlev
author_facet	Dmitry Yakovlev
author_sort	Dmitry Yakovlev
title	A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots
title_short	A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots
title_full	A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots
title_fullStr	A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots
title_full_unstemmed	A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots
title_sort	simple model of radiation from a magnetized neutron star: accreted matter and polar hotspots
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4bb8caa2cbc047549114b49d447128d3
work_keys_str_mv	AT dmitryyakovlev asimplemodelofradiationfromamagnetizedneutronstaraccretedmatterandpolarhotspots AT dmitryyakovlev simplemodelofradiationfromamagnetizedneutronstaraccretedmatterandpolarhotspots
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A Simple Model of Radiation from a Magnetized Neutron Star: Accreted Matter and Polar Hotspots

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