Equation of state and neutron star properties with new mass-radius constraints from PSR J1614--2230, PSR J2124--3358, and 47 Tuc X7

arXiv:2609.00173 · astro-ph.HE, nucl-ex, nucl-th · Submitted 2026-08-31 · Read on arXiv

astro-ph.HE, nucl-ex, nucl-th

Submitted: 2026-08-31

Updated: 2026-08-31

Comments: 13 pages, 9 figures

Code: https://github.com/xpsi-group/neost

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Degeneracy — 5× in this paper · explained in 3 episodes
• Consistency — 3× in this paper · explained in 3 episodes
• Bayesian Inference — 1× in this paper · explained in 5 episodes

Sources

• Many-body perturbation theory for the nuclear equation of state up to fifth order
• A NICER view of the millisecond pulsar PSR J2124 - 3358: evidence for a helium atmosphere
• A NICER View of PSR J0030+0451: Updated Constraints from Six Years of NICER Observations
• Astrophysics equation of state inference with Bayesian chiral effective field theory uncertainties
• A New Bayesian Framework with Natural Priors to Constrain the Neutron Star Equation of State

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