Speaker
Dr
Tsuneo Noda
(Kurume Institute of Technology)
Description
The observations of the central source of Cassiopeia A (Cas A) indicates that the compact star has large mass and high effective temperature, and suggests that its location on the cooling diagram is in the standard cooling region. There are some other compact stars which have low effective temperature, and they require an exotic phase which appears at high density, for large neutrino emissivity. Assuming the cooled stars have larger mass than the mass of Cas A, it seems to satisfy the temperature observations, but they should have very large masses. It may conflict with the mass observation of other compact stars in binary systems.
We investigate the effect of the color superconducting quark matter phase on the thermal evolution of compact stars. We assume the color superconducting quark phase has large energy gap, and we simulate the thermal evolution of the compact stars. We present cooling curves obtained from the evolutionary calculations of compact stars: while heavier stars cool slowly, and lighter ones indicate the opposite tendency.
Author
Dr
Tsuneo Noda
(Kurume Institute of Technology)
Co-authors
Prof.
Masa-aki Hashimoto
(Kyushu University)
Prof.
Masayuki Y. Fujimoto
(Hokkaido Univ.)
Dr
Nobutoshi Yasutake
(Chiba Institute of Technology)
Dr
Toshiki Maruyama
(Japan Atomic Energy Agency)
Dr
Toshitaka Tatsumi
(Kyoto U.)
