Black hole-neutron star mergers using a survey of finite-temperature equations of state
Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of state: gravitational waves via its effect on tidal disruption, the kilonova via its effect on the ejecta, and the gamma ray burst via its effect on the remnant disk. These ef...
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| Published in | arXiv.org |
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| Main Authors | , , , , , , , , , |
| Format | Paper Journal Article |
| Language | English |
| Published |
Ithaca
Cornell University Library, arXiv.org
25.04.2018
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| ISSN | 2331-8422 |
| DOI | 10.48550/arxiv.1804.09823 |
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| Abstract | Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of state: gravitational waves via its effect on tidal disruption, the kilonova via its effect on the ejecta, and the gamma ray burst via its effect on the remnant disk. These effects have been studied by numerical simulations and quantified by semi-analytic formulae. However, most of the simulations on which these formulae are based use equations of state without finite temperature and composition-dependent nuclear physics. In this paper, we simulate black hole-neutron star mergers varying both the neutron star mass and the equation of state, using three finite-temperature nuclear models of varying stiffness. Our simulations largely vindicate formulae for ejecta properties but do not find the expected dependence of disk mass on neutron star compaction. We track the early evolution of the accretion disk, largely driven by shocking and fallback inflow, and do find notable equation of state effects on the structure of this early-time, neutrino-bright disk. |
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| AbstractList | Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of state: gravitational waves via its effect on tidal disruption, the kilonova via its effect on the ejecta, and the gamma ray burst via its effect on the remnant disk. These effects have been studied by numerical simulations and quantified by semi-analytic formulae. However, most of the simulations on which these formulae are based use equations of state without finite temperature and composition-dependent nuclear physics. In this paper, we simulate black hole-neutron star mergers varying both the neutron star mass and the equation of state, using three finite-temperature nuclear models of varying stiffness. Our simulations largely vindicate formulae for ejecta properties but do not find the expected dependence of disk mass on neutron star compaction. We track the early evolution of the accretion disk, largely driven by shocking and fallback inflow, and do find notable equation of state effects on the structure of this early-time, neutrino-bright disk. Phys. Rev. D 98, 063009 (2018) Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of state: gravitational waves via its effect on tidal disruption, the kilonova via its effect on the ejecta, and the gamma ray burst via its effect on the remnant disk. These effects have been studied by numerical simulations and quantified by semi-analytic formulae. However, most of the simulations on which these formulae are based use equations of state without finite temperature and composition-dependent nuclear physics. In this paper, we simulate black hole-neutron star mergers varying both the neutron star mass and the equation of state, using three finite-temperature nuclear models of varying stiffness. Our simulations largely vindicate formulae for ejecta properties but do not find the expected dependence of disk mass on neutron star compaction. We track the early evolution of the accretion disk, largely driven by shocking and fallback inflow, and do find notable equation of state effects on the structure of this early-time, neutrino-bright disk. |
| Author | Duez, Matthew D Foucart, Francois Wyatt Brege Scheel, Mark A Kidder, Lawrence E Pfeiffer, Harald P Deaton, M Brett Caro, Jesus Hemberger, Daniel A O'Connor, Evan |
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| BackLink | https://doi.org/10.1103/PhysRevD.98.063009$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.1804.09823$$DView paper in arXiv |
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| DOI | 10.48550/arxiv.1804.09823 |
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| Snippet | Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of state: gravitational waves via... Phys. Rev. D 98, 063009 (2018) Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of... |
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| SubjectTerms | Accretion disks Black holes Computer simulation Disruption Ejecta Equations of state Gamma rays Gravitational effects Gravitational waves Inflow Mathematical models Neutrinos Neutron stars Neutrons Nuclear models Nuclear physics Physics - General Relativity and Quantum Cosmology Physics - High Energy Astrophysical Phenomena Star mergers Stellar evolution Stiffness Temperature dependence |
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| Title | Black hole-neutron star mergers using a survey of finite-temperature equations of state |
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