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Thermal Mass limit of Neutron Cores

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arxiv 1411.5203 v2 pith:5NHAFMMK submitted 2014-11-19 gr-qc astro-ph.HEhep-th

classification gr-qcastro-ph.HEhep-th
keywords masstemperaturethermalcalculationcoreslimitmaximumneutron
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abstract

Static thermal equilibrium of a quantum self-gravitating ideal gas in general relativity is studied at any temperature, taking into account the Tolman-Ehrenfest effect. Thermal contribution to the gravitational stability of static neutron cores is quantified. The curve of maximum mass with respect to temperature is reported. At low temperatures the Oppenheimer-Volkoff calculation is recovered, while at high temperatures the recently reported classical gas calculation is recovered. An ultimate upper mass limit $M = 2.43M_\odot$ of all maximum values is found to occur at Tolman temperature $ T = 1.27mc^2$ with radius $R = 15.2km$.

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    For non-viscous fluids in normal flow on static or stationary spacetimes, the redshifted heat current is conserved and the redshifted temperature obeys a curved-space Laplace-type heat equation.

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