Open AccessThermal evolution of rotating hybrid stars
Author(s) -
Kang Miao,
Zheng XiaoPing
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.11416.x
Subject(s) - physics , neutron star , strange matter , deconfinement , astrophysics , quark star , pulsar , millisecond pulsar , stars , nuclear matter , nuclear physics , quark , nucleon
As a neutron star spins down, the nuclear matter is continuously converted into quark matter due to the core density increase, and then latent heat is released. We have investigated the thermal evolution of neutron stars undergoing such deconfinement phase transition. We have taken into account the conversion in the frame of the general theory of relativity. The released energy has been estimated as a function of changed rate of deconfinement baryon number. The numerical solutions to the cooling equation are seen to be very different from those without the heating effect. The results show that neutron stars may be heated to higher temperatures which is well matched with pulsar's data despite the onset of fast cooling in neutron stars with quark matter cores. It is also found that the heating effect has a magnetic field strength dependence. This feature could be particularly interesting for high temperatures of low‐field millisecond pulsars at a later stage. The high temperature could fit the observed temperature for PSR J0437−4715.