Sound Velocity Bound and Neutron Stars
Abstract
A conjecture that the velocity of sound in any medium is smaller than the velocity of light in vacuum divided by sqrt(3). Simple arguments support this bound in nonrelativistic and/or weakly coupled theories. Moreover, the bound has been demonstrated in several classes of strongly coupled theories with gravity duals and is saturated only in conformal theories. Here, we point out that the existence of neutron stars with masses around two solar masses combined with the knowledge of the equation of state of hadronic matter at low densities is in strong tension with this bound.
- Authors:
-
- Univ. of Maryland, College Park, MD (United States)
- Univ. of Washington, Seattle, WA (United States); Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1265809
- Alternate Identifier(s):
- OSTI ID: 1181543
- Report Number(s):
- INT-PUB-14-021
Journal ID: ISSN 0031-9007
- Grant/Contract Number:
- AC05-00OR22725; FG02-93ER-40762
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 3; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Bedaque, Paulo, and Steiner, Andrew W. Sound Velocity Bound and Neutron Stars. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.114.031103.
Bedaque, Paulo, & Steiner, Andrew W. Sound Velocity Bound and Neutron Stars. United States. https://doi.org/10.1103/PhysRevLett.114.031103
Bedaque, Paulo, and Steiner, Andrew W. Wed .
"Sound Velocity Bound and Neutron Stars". United States. https://doi.org/10.1103/PhysRevLett.114.031103. https://www.osti.gov/servlets/purl/1265809.
@article{osti_1265809,
title = {Sound Velocity Bound and Neutron Stars},
author = {Bedaque, Paulo and Steiner, Andrew W.},
abstractNote = {A conjecture that the velocity of sound in any medium is smaller than the velocity of light in vacuum divided by sqrt(3). Simple arguments support this bound in nonrelativistic and/or weakly coupled theories. Moreover, the bound has been demonstrated in several classes of strongly coupled theories with gravity duals and is saturated only in conformal theories. Here, we point out that the existence of neutron stars with masses around two solar masses combined with the knowledge of the equation of state of hadronic matter at low densities is in strong tension with this bound.},
doi = {10.1103/PhysRevLett.114.031103},
journal = {Physical Review Letters},
number = 3,
volume = 114,
place = {United States},
year = {Wed Jan 21 00:00:00 EST 2015},
month = {Wed Jan 21 00:00:00 EST 2015}
}
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