Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations
Abstract
The direct Urca process of rapid neutrino emission can occur in nonuniform nuclear pasta phases that are expected in the inner crusts of neutron stars. Here, the periodic potential for a nucleon in nuclear pasta allows momentum conservation to be satisfied for direct Urca reactions. We improve on earlier work by modeling a rich variety of pasta phases (gnocchi, waffle, lasagna, and anti-spaghetti) with large-scale molecular dynamics simulations. We find that the neutrino luminosity due to direct Urca reactions in nuclear pasta can be 3 to 4 orders of magnitude larger than that from the modified Urca process in the NS core. Thus neutrino radiation from pasta could dominate radiation from the core and this could significantly impact the cooling of neutron stars.
- Authors:
-
[1];
[3];
[1]
- Arizona State Univ., Tempe, AZ (United States)
- Illinois State University (ISU), Normal, IL (United States)
- Indiana Univ., Bloomington, IN (United States). Center for Exploration of Energy and Matter
- Publication Date:
- Research Org.:
- Indiana Univ., Bloomington, IN (United States); Michigan State Univ., East Lansing, MI (United States); Arizona State Univ., Tempe, AZ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1849969
- Grant/Contract Number:
- FG02-87ER40365; SC0018083; SC0019470; PHY-1613708
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. C
- Additional Journal Information:
- Journal Volume: 102; Journal Issue: 4; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics; Electroweak interactions in nuclear physics; Nuclear astrophysics; Nuclear matter in neutron stars; Nuclear reactions; Nucleus-neutrino interactions
Citation Formats
Lin, Zidu, Caplan, Matthew E., Horowitz, Charles J., and Lunardini, Cecilia. Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations. United States: N. p., 2020.
Web. doi:10.1103/physrevc.102.045801.
Lin, Zidu, Caplan, Matthew E., Horowitz, Charles J., & Lunardini, Cecilia. Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations. United States. https://doi.org/10.1103/physrevc.102.045801
Lin, Zidu, Caplan, Matthew E., Horowitz, Charles J., and Lunardini, Cecilia. Tue .
"Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations". United States. https://doi.org/10.1103/physrevc.102.045801. https://www.osti.gov/servlets/purl/1849969.
@article{osti_1849969,
title = {Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations},
author = {Lin, Zidu and Caplan, Matthew E. and Horowitz, Charles J. and Lunardini, Cecilia},
abstractNote = {The direct Urca process of rapid neutrino emission can occur in nonuniform nuclear pasta phases that are expected in the inner crusts of neutron stars. Here, the periodic potential for a nucleon in nuclear pasta allows momentum conservation to be satisfied for direct Urca reactions. We improve on earlier work by modeling a rich variety of pasta phases (gnocchi, waffle, lasagna, and anti-spaghetti) with large-scale molecular dynamics simulations. We find that the neutrino luminosity due to direct Urca reactions in nuclear pasta can be 3 to 4 orders of magnitude larger than that from the modified Urca process in the NS core. Thus neutrino radiation from pasta could dominate radiation from the core and this could significantly impact the cooling of neutron stars.},
doi = {10.1103/physrevc.102.045801},
journal = {Physical Review. C},
number = 4,
volume = 102,
place = {United States},
year = {Tue Oct 06 00:00:00 EDT 2020},
month = {Tue Oct 06 00:00:00 EDT 2020}
}
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