Neutron stars with a crossover equation of state

Neutron stars with a crossover equation of state

Phys. Rev. C 104, 012801 (2021) The question of whether quark matter exists in neutron stars is a long standing one. Generally one finds that a first order phase transition from baryons to quarks softens the equation of state so much that the star would collapse into a black hole. We consider a cros...

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Bibliographic Details
Main Authors: Kapusta, J. I, Welle, T
Format: Journal Article
Language:English
Published: 30-03-2021
Subjects:
Physics - Nuclear Theory
Online Access:Get full text
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Summary:Phys. Rev. C 104, 012801 (2021) The question of whether quark matter exists in neutron stars is a long standing one. Generally one finds that a first order phase transition from baryons to quarks softens the equation of state so much that the star would collapse into a black hole. We consider a crossover equation of state, similar to the crossover that is found in lattice QCD studies at finite temperature and zero or small baryon chemical potentials. We find that with reasonable parameters it may be possible to support neutron stars up to about 2.2 solar masses. In that case 1 to 10% of the pressure would be contributed by quark matter in the central core of the highest mass stars.
DOI:10.48550/arxiv.2103.16633