Recurring region for neutron-star observables

[2506.24069] Recurring region for neutron-star observables Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Astrophysics > High Energy Astrophysical Phenomena arXiv:2506.24069 (astro-ph) [Submitted on 30 Jun 2025 ( v1 ), last revised 14 Aug 2026 (this version, v2)] Title: Recurring region for neutron-star observables Authors: Alexander Clevinger , Zidu Lin , Milena Albino , Peter Hammond , Veronica Dexheimer , Andrew Steiner View a PDF of the paper titled Recurring region for neutron-star observables, by Alexander Clevinger and 5 other authors View PDF HTML (experimental) Abstract: In this letter, we report a novel, somewhat analytical way to produce equations of state (EOSs) that generate particular values of neutron star mass, radius, and tidal deformability. This is possible because our description for the EoS of dense matter can produce recurring regions, small areas where several EoSs cross in the mass-radius and mass-tidal deformability diagrams. We can place recurring regions in desired locations of these diagrams, corresponding e.g., to a given observation. Our prescription is versatile, in the sense that different microscopic models can be used for the low density hadronic phase and high density quark phase, as long as they are connected by a percolation, a description that mimics quark deconfinement and is motivated by QCD. The several EoSs that pass by a recurring region can present different thresholds for the boundaries of the percolation region (different beginning and ending for the quark deconfinement region), as well as different orders for the phase transition at the boundaries. When combining all these features, our prescription allows one not only to produce an EoS that matches an observation, but also one that matches specific chosen criteria for the EoS. The EoSs produced by this new method will be specially suitable for the study of dense-matter properties in future gravitational-wave observations, when both the inspiral and post-merger phase signals will become available. Our numerical code that calculates recurring regions using CompOSE microscopic EoSs is open source and publicly available. Subjects: High Energy Astrophysical Phenomena (astro-ph.HE) ; Nuclear Theory (nucl-th) Cite as: arXiv:2506.24069 [astro-ph.HE] (or arXiv:2506.24069v2 [astro-ph.HE] for this version) https://doi.org/10.48550/arXiv.2506.24069 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Rev. D 113, L081301 (2026) Related DOI : https://doi.org/10.1103/32rl-1lwc Focus to learn more DOI(s) linking to related resources Submission history From: Alexander Clevinger [ view email ] [v1] Mon, 30 Jun 2025 17:22:00 UTC (486 KB) [v2] Fri, 14 Aug 2026 18:09:16 UTC (601 KB) Full-text links: Access Paper: View a PDF of the paper titled Recurring region for neutron-star observables, by Alexander Clevinger and 5 other authors View PDF HTML (experimental) TeX Source view license Additional Features Audio Summary Current browse context: astro-ph.HE < prev | next > new | recent | 2025-06 Change to browse by: astro-ph nucl-th References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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