Melissa Mendes, Jan-Erik Christian, Farrukh J. Fattoyev, Jürgen Schaffner-Bielich
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Abstract
We investigate the influence of a phase transition from hadronic matter to a deconfined quark phase inside a neutron star on its cooling behavior including the appearance of twin star solutions in the mass-radius diagram. We find that while the inferred neutrino luminosity of cold transiently accreting star in MXB 1659-29 is reproduced in all of the constructed twin star models, the luminosity of a colder source, the neutron star in SAX J1808.4-3658, cannot be described by equations of state with quark-hadron transition densities below 1.7 saturation density, suggesting that twin stars with such low density transitions to the quark phase are not realized in nature. We also discuss how constraints to the quark-hadron phase transition density are strongly dependent on the cooling effectiveness of neutrino reactions in the quark phase. Published by the American Physical Society2025
期刊介绍：
Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics.
PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including:
Particle physics experiments,
Electroweak interactions,
Strong interactions,
Lattice field theories, lattice QCD,
Beyond the standard model physics,
Phenomenological aspects of field theory, general methods,
Gravity, cosmology, cosmic rays,
Astrophysics and astroparticle physics,
General relativity,
Formal aspects of field theory, field theory in curved space,
String theory, quantum gravity, gauge/gravity duality.
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