The International Workshop on
Quark Phase Transition in Compact Objects and Multimessenger Astronomy:
Neutrino Signals, Supernovae and Gamma-Ray Bursts

7-14 October 2015

On some exotic properties of hybrid stars Yudin A.

Abstract

      We consider two "wonders" of hybrid stars, i.e. stars which contain a core made of quark matter. First, we explain the existence of a very small region on the mass–radius (M-R) diagram of hybrid stars where all of the lines representing the sequences of models with different values of the bag constant B intersect. This circumstance is shown to be a consequence of the linear dependence of pressure on energy density in the quark cores of hybrid stars. Second, we show that the unusual thermodynamic properties of matter within the region of two-phase coexistence in hybrid stars result in a change of the standard condition for beginning of convection. In particular, the thermal flux transported by convection may be directed towards the stellar center. We discuss favorable circumstances leading to such an effect of "inverse" convection and its possible influence on the thermal evolution of hybrid stars.

Reference:
Yudin A., "On some exotic properties of hybrid stars", in "Proceedings of the International Workshop on Quark Phase Transition in Compact Objects and Multimessenger Astronomy: Neutrino Signals, Supernovae and Gamma-Ray Bursts", Russia, Nizhnij Arkhyz (SAO RAS), Terskol (BNO INR RAS), October, 7 - 14, 2015, Publishing house "Sneg", Pyatigorsk, 2016, ISBN 978-5-903129-85-0, pp. 162-167.
DOI: 10.26119/SAO.2020.1.51292
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