Astrophysics and Nuclear Physics Informed Interactions in Dense Matter: Inclusion of PSR J0437-4715

Abstract

We investigate how vector-isoscalar and vector-isovector interactions can be determined within the density regime of neutron stars (NSs), while fulfilling nuclear and astrophysics constrains. We make use of the Chiral Mean Field (CMF) model, a SU(3) nonlinear realization of the sigma model within the mean-field approximation, for the first time within a Bayesian analysis framework. We show that neutron-matter $\chi$EFT constraints at low density are only satisfied if the vector-isovector mixed interaction term is included, e.g., a ${\omega }^2{\rho }^2$ term. We also show the behavior of the model with respect to the conformal limit. We demonstrate that the CMF model is able to predict a value for the parameter $d_c$ related to the trace anomaly and its derivative takes values below 0.2 above four times saturation density within a hadronic version of the model that does not include hyperons or a phase transition to deconfined matter. We compare these effects with results from other (non-chiral) Relativistic Mean Field models to assess how different approaches to incorporating the same physical constraints affect predictions of NS properties and dense matter equations of state. We also include data from the gravitation wave event GW230529 detected by the LIGO-Virgo-Kagra collaboration and the most recent radius measurement of PSR J0437-4715 from the NASA NICER mission. Our analysis reveals that this new NICER measurement leads to an average reduction of approximately $\sim 0.1$ km radius in the posterior of the NS mass-radius relationship.

8 pages, 5 figures

References in corpus (13)

• 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
• Relativistic Mean-Field Hadronic Models under Nuclear Matter Constraints
• Proto-Neutron and Neutron Stars in a Chiral SU(3) Model
• An updated mass-radius analysis of the 2017-2018 NICER data set of PSR J0030+0451
• Incompressibility in finite nuclei and nuclear matter
• Determination of the Equation of State from Nuclear Experiments and Neutron Star Observations
• Many-body forces in the equation of state of hyperonic matter
• Phase Transition Phenomenology with Nonparametric Representations of the Neutron Star Equation of State
• Reconciling Nuclear and Astrophysical Constraints
• A chiral lagrangian with Broken Scale: testing the restoration of symmetries in astrophysics and in the laboratory
• Implications of comprehensive nuclear and astrophysics data on the equations of state of neutron star matter
• Modern nuclear and astrophysical constraints of dense matter in a renormalized chiral approach

Cited by in corpus (12)

• How the QCD trace anomaly behaves at the core of twin stars?
• Feasibility of dark matter admixed neutron star based on recent observational constraints
• Implications of latest NICER data for the neutron star equation of state
• Novel Scalings of Neutron Star Properties from Analyzing Dimensionless Tolman--Oppenheimer--Volkoff Equations
• Nambu-Jona-Lasinio description of hadronic matter from a Bayesian approach
• Frozen and $\beta$-equilibrated $f$ and $p$ modes of cold neutron stars: nuclear metamodel predictions
• Analyzing the dense matter equation of states in the light of the compact object HESS J1731-347
• Bayesian Analysis of the Neutron Star Equation of State and Model Comparison: Insights from PSR J0437+4715, PSR J0614+3329, and Other Multi-Physics Data
• Neutron Star Radii from Laboratory Experiments
• Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars
• Equation of state for hyperonic neutron-star matter in SU(3) flavor symmetry
• Parity-doubled nucleons can rapidly cool neutron stars