Damping of density oscillations in neutrino-transparent nuclear matter
Abstract
We calculate the bulk-viscous dissipation time for adiabatic density oscillations in nuclear matter at densities of 1-7 times nuclear saturation density and at temperatures ranging from 1 MeV, where corrections to previous low-temperature calculations become important, up to 10 MeV, where the assumption of neutrino transparency is no longer valid. Under these conditions, which are expected to occur in neutron star mergers, damping of density oscillations arises from beta equilibration via weak interactions. We find that for 1 kHz oscillations the shortest dissipation times are in the 5 to 20 ms range, depending on the equation of state, which means that bulk viscous damping could affect the dynamics of a neutron star merger. For higher frequencies the dissipation time can be even shorter.
- Publication Date:
- Research Org.:
- Washington Univ., St. Louis, MO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1566844
- Alternate Identifier(s):
- OSTI ID: 1595001
- Grant/Contract Number:
- FG02-05ER41375
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 3; Related Information: https://journals.aps.org/prc/supplemental/10.1103/PhysRevC.100.035803; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; neutron star; bulk viscosity; density oscillation; energy dissipation; urca process
Citation Formats
Alford, Mark G., and Harris, Steven P. Damping of density oscillations in neutrino-transparent nuclear matter. United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.100.035803.
Alford, Mark G., & Harris, Steven P. Damping of density oscillations in neutrino-transparent nuclear matter. United States. https://doi.org/10.1103/PhysRevC.100.035803
Alford, Mark G., and Harris, Steven P. Fri .
"Damping of density oscillations in neutrino-transparent nuclear matter". United States. https://doi.org/10.1103/PhysRevC.100.035803. https://www.osti.gov/servlets/purl/1566844.
@article{osti_1566844,
title = {Damping of density oscillations in neutrino-transparent nuclear matter},
author = {Alford, Mark G. and Harris, Steven P.},
abstractNote = {We calculate the bulk-viscous dissipation time for adiabatic density oscillations in nuclear matter at densities of 1-7 times nuclear saturation density and at temperatures ranging from 1 MeV, where corrections to previous low-temperature calculations become important, up to 10 MeV, where the assumption of neutrino transparency is no longer valid. Under these conditions, which are expected to occur in neutron star mergers, damping of density oscillations arises from beta equilibration via weak interactions. We find that for 1 kHz oscillations the shortest dissipation times are in the 5 to 20 ms range, depending on the equation of state, which means that bulk viscous damping could affect the dynamics of a neutron star merger. For higher frequencies the dissipation time can be even shorter.},
doi = {10.1103/PhysRevC.100.035803},
journal = {Physical Review C},
number = 3,
volume = 100,
place = {United States},
year = {Fri Sep 27 00:00:00 EDT 2019},
month = {Fri Sep 27 00:00:00 EDT 2019}
}
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