Thermal evolution of rotating hybrid stars

Details Thermal evolution of rotating hybrid stars Thermal evolution of rotating hybrid stars

2006-09-23

arxiv.org/abs/astro-ph/0609641v2

Mon.Not.Roy.Astron.Soc.375:1503-1509,2007

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures

Scientific paper

10.1111/j.1365-2966.2006.11416.x

As a neutron star spins down, the nuclear matter continuously is 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 change rate of deconfinement baryon number. Numerical solutions to cooling equation are obtained to be very different from the without heating effect. The results show that neutron stars may be heated to higher temperature which is well-matched with pulsar's data despite onset of fast cooling in neutron stars with quark matter core. It is also found that heating effect has magnetic field strength dependence. This feature could be particularly interesting for high temperature of low-field millisecond pulsar at late stage. The high temperature could fit the observed temperature for PSR J0437-4715.

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