Constraints on the Maximum Mass of Neutron Stars with a Quark Core from GW170817 and NICER PSR J0030+0451 Data

Document Type

Article

Publication Date

5-21-2021

Publication Title

Astrophysical Journal

Volume

913

Issue

1

First page number:

1

Last page number:

10

Abstract

We perform a Bayesian analysis of the maximum mass MTOV of neutron stars with a quark core, incorporating the observational data from tidal deformability of the GW170817 binary neutron star merger as detected by LIGO/Virgo and the mass and radius of PSR J0030+0451 as detected by the Neutron Star Interior Composition Explorer. The analysis is performed under the assumption that the hadron–quark phase transition is of first order, where the low-density hadronic matter described in a unified manner by the soft QMF or the stiff DD2 equation of state (EOS) transforms into a high-density phase of quark matter modeled by the generic "constant-sound-speed" parameterization. The mass distribution measured for the 2.14 M⊙ pulsar MSP J0740+6620 is used as the lower limit on MTOV. We find the most probable values of the hybrid star maximum mass are... (See full abstract in article).

Disciplines

Stars, Interstellar Medium and the Galaxy

Language

English

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