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  Black hole-neutron star mergers using a survey of finite-temperature equations of state

Brege, W., Duez, M. D., Foucart, F., Deaton, M. B., Caro, J., Hemberger, D. A., et al. (2018). Black hole-neutron star mergers using a survey of finite-temperature equations of state. Physical Review D, 98 (6): 063009. doi:10.1103/PhysRevD.98.063009.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-754C-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E8D5-8
Genre: Journal Article

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 Creators:
Brege, Wyatt, Author
Duez, Matthew D., Author
Foucart, Francois, Author
Deaton, M. Brett, Author
Caro, Jesus, Author
Hemberger, Daniel A., Author
Kidder, Lawrence E., Author
O'Connor, Evan, Author
Pfeiffer, Harald1, Author              
Scheel, Mark A., Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 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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 Dates: 2018-04-252018
 Publication Status: Published in print
 Pages: 10 pages, 11 figures, submitted to Phys. Rev. D
 Publishing info: -
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 Rev. Method: -
 Identifiers: arXiv: 1804.09823
URI: http://arxiv.org/abs/1804.09823
DOI: 10.1103/PhysRevD.98.063009
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 98 (6) Sequence Number: 063009 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258