Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers

Fuente: arXiv

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Bibliographic Details
Main Authors:	Hammond, P., Clevinger, A., Albino, M., Dexheimer, V., Bernuzzi, S., Brown, C., Cook, W., Daszuta, B., Fields, J., Grundy, E., Providência, C., Radice, D., Steiner, A.
Format:	Preprint
Published:	2025
Subjects:	High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Nuclear Theory
Online Access:	Acceder al recurso
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_version_	1866908854986473472
author	Hammond, P. Clevinger, A. Albino, M. Dexheimer, V. Bernuzzi, S. Brown, C. Cook, W. Daszuta, B. Fields, J. Grundy, E. Providência, C. Radice, D. Steiner, A.
author_facet	Hammond, P. Clevinger, A. Albino, M. Dexheimer, V. Bernuzzi, S. Brown, C. Cook, W. Daszuta, B. Fields, J. Grundy, E. Providência, C. Radice, D. Steiner, A.
contents	In this paper we investigate quark deconfinement in neutrons stars and their mergers, focusing on the effects of higher orders for the phase transition between hadronic and quark matter. The different descriptions we use to describe matter microscopically contain varying particle degrees of freedom, including nucleons, hyperons, Delta baryons, and light and strange quarks. We use tabulated equations of state from the CompOSE database in which the quark deconfinement phase transition is described as being first-order, and then smooth it out by introducing a percolation, replacing the single first-order phase transition with two transitions of second or third order. We then perform binary neutron-star merger simulations using these new equations of st ate, focusing on groups of binaries with the same single-star mass, radius, and tidal deformability, but different equations of state. We go on to discuss differences in their evolution, and the ramifications for interpreting future gravitational wave observations and the potential to learn about dense matter.
format	Preprint
id	arxiv_https___arxiv_org_abs_2508_10698
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers Hammond, P. Clevinger, A. Albino, M. Dexheimer, V. Bernuzzi, S. Brown, C. Cook, W. Daszuta, B. Fields, J. Grundy, E. Providência, C. Radice, D. Steiner, A. High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Nuclear Theory In this paper we investigate quark deconfinement in neutrons stars and their mergers, focusing on the effects of higher orders for the phase transition between hadronic and quark matter. The different descriptions we use to describe matter microscopically contain varying particle degrees of freedom, including nucleons, hyperons, Delta baryons, and light and strange quarks. We use tabulated equations of state from the CompOSE database in which the quark deconfinement phase transition is described as being first-order, and then smooth it out by introducing a percolation, replacing the single first-order phase transition with two transitions of second or third order. We then perform binary neutron-star merger simulations using these new equations of st ate, focusing on groups of binaries with the same single-star mass, radius, and tidal deformability, but different equations of state. We go on to discuss differences in their evolution, and the ramifications for interpreting future gravitational wave observations and the potential to learn about dense matter.
title	Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers
topic	High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Nuclear Theory
url	https://arxiv.org/abs/2508.10698