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Cooling of neutron stars with strong toroidal magnetic fields |
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| Authors: | Dany Page Ulrich Geppert Manfred Küker |
| Institution: | (1) Departamento de Astrofísica Teórica, Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico, D.F. 04510, Mexico;(2) Departament de Física Aplicada, Universitat d’Alacant, 03080 Alacant, Spain;(3) Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany |
| Abstract: | We present models of temperature distribution in the crust of a neutron star in the presence of a strong toroidal component superposed to the poloidal component of the magnetic field. The presence of such a toroidal field hinders heat flow toward the surface in a large part of the crust. As a result, the neutron star surface presents two warm regions surrounded by extended cold regions and has a thermal luminosity much lower than in the case the magnetic field is purely poloidal. We apply these models to calculate the thermal evolution of such neutron stars and show that the lowered photon luminosity naturally extends their life-time as detectable thermal X-ray sources. Work partially supported by UNAM-DGAPA grant #IN119306. |
| Keywords: | Neutron star Magnetic field |
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