Universal Relations for Binary Neutron Star Mergers with Long-lived Remnants

Abstract

We present a novel universal relation for binary neutron star mergers with long-lived neutron star remnants: inspired by recent work based on numerical relativity simulations, we propose a novel approach using perturbative calculations that allow us to relate the pre-merger neutron star binary tidal deformability to the effective compactness of the post-merger remnant. Our results allow for the prediction of the stellar parameters of a long-lived remnant neutron star from the study of gravitational waves emitted during the pre-merger phase.

arXiv comment17 pages, 14 figures, 16 tables, submitted to PRD

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• Heavy Baryons in Compact Stars
• Universal relations for rapidly rotating cold and hot hybrid star
• Constraining equation of state groups from $g$-mode asteroseismology
• Oscillation Modes and Gravitational Waves from Strangeon Stars
• Fast Rotating Neutron Stars: Oscillations and Instabilities
• Measuring spin in coalescing binaries of neutron stars showing double precursors
• Insights into Binary Neutron Star Merger Simulations: A Multi-Code Comparison
• Effect of symmetry energy on properties of rapidly rotating neutron stars and universal relations
• Universal relation between dipole polarizability of finite nuclei and neutron-star compactness