http://arxiv.org/abs/2101.04032
In this paper, we find the heat capacity of the magnetic dual chiral density wave (MDCDW) phase of dense quark matter and use it to explore the feasibility of this phase for a neutron star core. MDCDW is a spatially inhomogeneous phase of quark matter known to be favored at intermediate densities over the chirally symmetric phase and the color-flavor-locked superconducting phase. By comparing our result to the lower limit of the core heat capacity established from observations of transiently-accreting neutron stars, we show that the heat capacity of a core made of MDCDW quark matter is well above that lower limit and hence cannot be ruled out. This result adds to a wealth of complementary investigations, all of which has served to strengthen the viability of a neutron star core made of MDCDW quark matter. For completeness, we review the contributions to the heat capacity of the main neutron-star ingredients at low, high and intermediate densities.
E. Ferrer, V. Incera and P. Sanson
Tue, 12 Jan 21
46/90
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