The neutron star in Cassiopeia A: equation of state, superfluidity, and Joule heating

被引：25
|
作者：
Bonanno, A. [1 ,2 ]
Baldo, M. [2 ]
Burgio, G. F. [2 ]
Urpin, V. [1 ,3 ]
机构：
[1] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy
[2] Ist Nazl Fis Nucl, Sez Catania, I-95123 Catania, Italy
[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
来源：
ASTRONOMY & ASTROPHYSICS | 2014年 / 561卷
关键词：
dense matter; equation of state; stars: neutron; stars: magnetic field; supernovae: individual: Cassiopeia A; BRUECKNER-GOLDSTONE EXPANSION; 3-BODY FORCES; EVOLUTION; DYNAMOS; CONVECTION; MATTER;
D O I：
10.1051/0004-6361/201322514
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The thermomagnetic evolution of the young neutron star Cassiopea A is studied by considering fast neutrino emission processes. In particular, we consider neutron star models obtained from the equation of state computed in the framework of the Brueckner-Bethe-Goldstone many-body theory and variational methods, and models obtained with the Akmal-Pandharipande-Ravenhall equation of state. It is shown that it is possible to explain a fast cooling regime as the one observed in the neutron star in Cassiopea A if the Joule heating produced by dissipation of the small-scale magnetic field in the crust is taken into account. We thus argue that it is difficult to put severe constraints on the superfluid gap if the Joule heating is considered.
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页数：4
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