Equation of state effects in the core collapse of a 20–M⊙ star

Schneider, Andre S.; Roberts, L. F.; Ott, C. D.; O'Connor, Evan

doi:10.1103/PhysRevC.100.055802

Title: Equation of state effects in the core collapse of a $20 – M_{⊙}$ star

Abstract

Uncertainties in our knowledge of the properties of dense matter near and above nuclear saturation density are among the main sources of variations in multimessenger signatures predicted for core-collapse supernovae (CCSNe) and the properties of neutron stars (NSs). We construct 97 new finite-temperature equations of state (EOSs) of dense matter that obey current experimental, observational, and theoretical constraints and discuss how systematic variations in the EOS parameters affect the properties of cold nonrotating NSs and the core collapse of a 20–M_⊙ progenitor star. The core collapse of the 20–M_⊙ progenitor star is simulated in spherical symmetry using the general-relativistic radiation-hydrodynamics code GR1D where neutrino interactions are computed for each EOS using the NuLib library. We conclude that the effective mass of nucleons at densities above nuclear saturation density is the largest source of uncertainty in the CCSN neutrino signal and dynamics even though it plays a subdominant role in most properties of cold NS matter. Meanwhile, changes in other observables affect the properties of cold NSs, while having little effect in CCSNe. To strengthen our conclusions, we perform six octant three-dimensional CCSN simulations varying the effective mass of nucleons at nuclear saturation density. Here, we conclude that neutrino heating and,more »« less

Authors:

^[1];

^[2];

^[3];

^[4]

Stockholm Univ. (Sweden); California Institute of Technology (CalTech), Pasadena, CA (United States)
Michigan State Univ., East Lansing, MI (United States)
OCS Labs LLC, Pasadena, CA (United States)
Stockholm Univ. (Sweden)

Publication Date:: 2019-11-07

Research Org.:: Stockholm Univ. (Sweden); California Institute of Technology (CalTech), Pasadena, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Oakland, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Science Foundation (NSF)

OSTI Identifier:: 1604342

Grant/Contract Number:: AC02-05CH11231; AST-1333520; PHY-1151197; PHY-1404569; OAC-1550514

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 100; Journal Issue: 5; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear matter; equation of state; core collapse; supernovae; neutron stars; equations of state of nuclear matter; novae & supernovae; nuclear astrophysics; nuclear matter in neutron stars; neutron stars & pulsars; astrophysical & cosmological simulations

Citation Formats


                    Schneider, Andre S., Roberts, L. F., Ott, C. D., and O'Connor, Evan. Equation of state effects in the core collapse of a 20–M⊙ star.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevC.100.055802.

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                    Schneider, Andre S., Roberts, L. F., Ott, C. D., & O'Connor, Evan. Equation of state effects in the core collapse of a 20–M⊙ star.  United States.  https://doi.org/10.1103/PhysRevC.100.055802

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                    Schneider, Andre S., Roberts, L. F., Ott, C. D., and O'Connor, Evan. Thu .  
"Equation of state effects in the core collapse of a 20–M⊙ star".  United States.  https://doi.org/10.1103/PhysRevC.100.055802.  https://www.osti.gov/servlets/purl/1604342.

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@article{osti_1604342,

  title        = {Equation of state effects in the core collapse of a 20–M⊙ star},

  author       = {Schneider, Andre S. and Roberts, L. F. and Ott, C. D. and O'Connor, Evan},

  abstractNote = {Uncertainties in our knowledge of the properties of dense matter near and above nuclear saturation density are among the main sources of variations in multimessenger signatures predicted for core-collapse supernovae (CCSNe) and the properties of neutron stars (NSs). We construct 97 new finite-temperature equations of state (EOSs) of dense matter that obey current experimental, observational, and theoretical constraints and discuss how systematic variations in the EOS parameters affect the properties of cold nonrotating NSs and the core collapse of a 20–M⊙ progenitor star. The core collapse of the 20–M⊙ progenitor star is simulated in spherical symmetry using the general-relativistic radiation-hydrodynamics code GR1D where neutrino interactions are computed for each EOS using the NuLib library. We conclude that the effective mass of nucleons at densities above nuclear saturation density is the largest source of uncertainty in the CCSN neutrino signal and dynamics even though it plays a subdominant role in most properties of cold NS matter. Meanwhile, changes in other observables affect the properties of cold NSs, while having little effect in CCSNe. To strengthen our conclusions, we perform six octant three-dimensional CCSN simulations varying the effective mass of nucleons at nuclear saturation density. Here, we conclude that neutrino heating and, thus, the likelihood of explosion is significantly increased for EOSs where the effective mass of nucleons at nuclear saturation density is large.},

  doi          = {10.1103/PhysRevC.100.055802},

  journal      = {Physical Review C},

  number       = 5,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {11}

}

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Works referencing / citing this record:

Influence of Density Dependence of Symmetry Energy in Hot and Dense Matter for Supernova Simulations
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Sumiyoshi, Kohsuke; Nakazato, Ken’ichiro; Suzuki, Hideyuki
The Astrophysical Journal, Vol. 887, Issue 2
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The overarching framework of core-collapse supernova explosions as revealed by 3D fornax simulations
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Burrows, Adam; Radice, David; Vartanyan, David
Monthly Notices of the Royal Astronomical Society, Vol. 491, Issue 2
DOI: 10.1093/mnras/stz3223

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Title: Equation of state effects in the core collapse of a 20 – M ⊙ star

Abstract

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Title: Equation of state effects in the core collapse of a $20 – M_{⊙}$ star

Tidal Deformabilities and Radii of Neutron Stars from the Observation of GW170817
journal, August 2018

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journal, February 2005

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journal, June 2005

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journal, January 2013

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journal, April 2007

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journal, July 2016

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journal, May 2012

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journal, December 2015

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journal, March 2018

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journal, December 2019

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journal, June 2018

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journal, February 2009

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journal, October 2017

Constraining the Speed of Sound inside Neutron Stars with Chiral Effective Field Theory Interactions and Observations
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