Quark color superconductivity and the cooling of compact stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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12 pages, talk presented at workshop "Continuous Advances in QCD 2002/Arkadyfest," Minneapolis, USA, 17-23 May, 2002. Author i

Scientific paper

The thermal conductivity of the color-flavor locked phase of dense quark matter is calculated. The dominant contribution to the conductivity comes from photons and Nambu-Goldstone bosons associated with the breaking of baryon number, both of which are trapped in the quark core. Because of their very large mean free path the conductivity is also very large. The cooling of the quark core arises mostly from the heat flux across the surface of direct contact with the nuclear matter. As the thermal conductivity of the neighboring layer is also high, the whole interior of the star should be nearly isothermal. Our results imply that the cooling time of compact stars with color-flavor locked quark cores is similar to that of ordinary neutron stars.

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