High-Density Sound Speed and Post-Merger Dynamics

arXiv:2607.15588 · astro-ph.HE · Submitted 2026-07-17 · Read on arXiv

John Stroud, David Radice, Sanjay Reddy

astro-ph.HE

Submitted: 2026-07-17

Comments: 31 pages, 11 figures. Fixed an outdated figure caption in figure 11, Fixed typos in the text and references

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

Terminology

• Core — 27× in this paper · explained in 2 episodes
• Equation of State (EoS) — 6× in this paper · explained in 4 episodes
• Consistency — 5× in this paper · explained in 3 episodes
• Ab Initio — 2× in this paper · explained in 1 episode
• Phase Transitions — 2× in this paper · explained in 2 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Degeneracy — 1× in this paper · explained in 3 episodes
• Effective Field Theory (EFT) — 1× in this paper · explained in 2 episodes
• Gauge Freedom — 1× in this paper · explained in 2 episodes
• Initial Data — 1× in this paper · explained in 2 episodes
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
• Properties of the binary neutron star merger GW170817
• Sound velocity bound and neutron stars
• A critical examination of constraints on the equation of state of dense matter obtained from GW170817
• Evidence for quark-matter cores in massive neutron stars
• A general, scale-independent description of the sound speed in neutron stars
• From existing and new nuclear and astrophysical constraints to stringent limits on the equation of state of neutron-rich dense matter
• Neutron Star Structure and the Equation of State
• The Physics of Neutron Stars
• Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
• The maximum mass and radius of neutron stars and the nuclear symmetry energy
• Perturbative QCD and the Neutron Star Equation of State
• Binary Neutron Star Mergers: Dependence on the Nuclear Equation of State
• Merger of binary neutron stars with realistic equations of state in full general relativity

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