Standard cooling of rapidly rotating isolated neutron stars in 2D

M. V. Beznogov,1 J. Novak,2 D. Page,3 A. R. Raduta1

1National Institute for Physics and Nuclear Engineering (IFIN-HH), RO-077125 Bucharest, Romania
2LUTH, Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, 5 Place Jules Janssen, 92195 Meudon, France
3Instituto de Astronomía, Universidad Nacional Autónoma de México, Ciudad de México, CDMX 04510, Mexico

We study the long-term thermal evolution of axisymmetric rotating neutron stars in full general relativity. To this aim we develop "NSCool 2D Rot", a major upgrade of the 1D neutron stars thermal evolution code "NSCool" by D. Page. As a first application of our new code we address the standard cooling of isolated neutron stars with rotation frequencies up to the mass shedding limit. We investigate the effects of the equation of state (EOS) by considering different combinations of core and crust EOSs. The results indicate complex time-dependent evolution of temperature distribution throughout the whole volume of the star and, in particular, in the crust. We show that most of that complexity can be attributed to the formation of a "heat blob" in the crust and to the latitude dependence of the heat diffusion timescale through the crust.


M. V. Beznogov, J. Novak, D. Page, A. R. Raduta, Astrophys. J. (accepted); e-print arXiv:2206.04539
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