Speaker
Description
Compact objects such as neutron stars are composed of matter so dense that they can be likened to a single, massive atomic nucleus. The density at their cores exceeds that of a nuclear nucleus, and it is predicted that various states of matter—not found in ordinary atomic nuclei—will emerge there. The state of matter within these objects has a significant impact on neutrino emission, which can be observed through the object’s surface temperature. By comparing the observed temperatures of compact objects with theoretical calculations, we can explore the state of matter inside them.
We investigated the thermal evolution of compact objects, assuming colour superconducting quark matter exists within them. Since multiple pairings are conceivable in the colour superconducting state, in this study we assumed that one of the following phases would emerge: the CFL phase, the 2SC phase, or the 2SC+$<dd>$ phase, which takes into account quark-hadron continuity of ${}^3P_2$ superfluidity. We found that considering the 2SC+$<dd>$ phase allows us to explain the observational results for compact objects.
| Category | Theory |
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