Bayesian analysis of multimessenger M-R data with interpolated hybrid EoS

Abstract

We introduce a family of equations of state (EoS) for hybrid neutron star (NS) matter that is obtained by a two-zone parabolic interpolation between a soft hadronic EoS at low densities and a set of stiff quark matter EoS at high densities within a finite region of chemical potentials ${\mu }_H<\mu <{\mu }_Q$. Fixing the hadronic EoS as the APR one and choosing the color-superconducting, nonlocal NJL model with two free parameters for the quark phase, we perform Bayesian analyses with this two-parameter family of hybrid EoS. Using three different sets of observational constraints that include the mass of PSR J0740+6620, the tidal deformability for GW170817, and the mass-radius relation for PSR J0030+0451 from NICER as obligatory (set 1), while set 2 uses the possible upper limit on the maximum mass from GW170817 as an additional constraint and set 3 instead of the possibility that the lighter object in the asymmetric binary merger GW190814 is a neutron star. We confirm that in any case, the quark matter phase has to be color superconducting with the dimensionless diquark coupling approximately fulfilling the Fierz relation ${\eta }_D=0.75$ and the most probable solutions exhibiting a proportionality between ${\eta }_D$ and ${\eta }_V$, the coupling of the repulsive vector interaction that is required for a sufficiently large maximum mass. We used the Bayesian analysis to investigate with the method of fictitious measurements the consequences of anticipating different radii for the massive $2M_{\odot }$ PSR J0740+6220 for the most likely equation of state. With the actual outcome of the NICER radius measurement on PSR J0740+6220 we could conclude that for the most likely hybrid star EoS would not support a maximum mass as large as $2.5M_{\odot }$ so that the event GW190814 was a binary black hole merger.

arXiv comment20 figures, 1 table, 18 pages

References in corpus (60)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Multi-messenger Observations of a Binary Neutron Star Merger
• The equation of state for nucleon matter and neutron star structure
• GW170817: Measurements of Neutron Star Radii and Equation of State
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Tidal Love numbers of neutron stars
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Tidal deformability of neutron stars with realistic equations of state and their gravitational wave signatures in binary inspiral
• Gravitational-wave constraints on the neutron-star-matter Equation of State
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Relativistic tidal properties of neutron stars
• Using gravitational-wave observations and quasi-universal relations to constrain the maximum mass of neutron stars
• Equation of state and neutron star properties constrained by nuclear physics and observation
• From hadrons to quarks in neutron stars: a review
• Relativistic theory of tidal Love numbers
• Hybrid stars that masquerade as neutron stars
• Neutron-star radius constraints from GW170817 and future detections
• I-Love-Q Relations in Neutron Stars and their Applications to Astrophysics, Gravitational Waves and Fundamental Physics
• Generic conditions for stable hybrid stars
• Stringent constraints on neutron-star radii from multimessenger observations and nuclear theory
• Continuity of Quark and Hadron Matter
• Quarkyonic Matter and Neutron Stars
• Maximum mass, moment of inertia and compactness of relativistic stars
• Constraining neutron star matter with QCD
• Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars
• Maximum mass of neutron stars and strange neutron-star cores
• Hadron-Quark Crossover and Massive Hybrid Stars with Strangeness
• New Critical Point Induced by the Axial Anomaly in Dense QCD
• New Neutron Star Equation of State with Quark-Hadron Crossover
• Modern compact star observations and the quark matter equation of state
• Implications of the measurement of pulsars with two solar masses for quark matter in compact stars and HIC. A NJL model case study
• GW190814 as a massive rapidly-rotating neutron star with exotic degrees of freedom
• Neutron Star Equation of State in light of GW190814
• Quark Description of Hadronic Phases
• Equation of state constraints from the threshold binary mass for prompt collapse of neutron star mergers
• Third family of compact stars within a nonlocal chiral quark model equation of state
• Constraining the equation of state of high-density cold matter using nuclear and astronomical measurements
• New class of hybrid EoS and Bayesian M-R data analysis
• Phase structure, collective modes, and the axial anomaly in dense QCD
• Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
• Equation of state constraints from nuclear physics, neutron star masses, and future moment of inertia measurements
• Hard-core deconfinement and soft-surface delocalization from nuclear to quark matter
• Hybrid equation of state with pasta phases and third family of compact stars
• Hybrid stars within a covariant, nonlocal chiral quark model
• Hyperon Puzzle, Hadron-Quark Crossover and Massive Neutron Stars
• Robustness of third family solutions for hybrid stars against mixed phase effects
• Hybrid Stars using the Quark-Meson Coupling and Proper Time NJL Models
• Neutron star structure from QCD
• Studying the onset of deconfinement with multi-messenger astronomy of neutron stars
• Two novel approaches to the hadron-quark mixed phase in compact stars
• The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
• Chirally improved quark Pauli blocking in nuclear matter and applications to quark deconfinement in neutron stars
• High-mass twins & resolution of the reconfinement, masquerade and hyperon puzzles of compact star interiors
• Gluon-Meson Duality
• Bayesian Analysis for Extracting Properties of the Nuclear Equation of State from Observational Data including Tidal Deformability from GW170817
• Studying the parameters of the extended $\sigma$-$\omega$ model for neutron star matter

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