Sound Velocity Bound and Neutron Stars

被引：253

作者：

Bedaque, Paulo ^{[1
]}

Steiner, Andrew W. ^{[2
,3
,4
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

[3] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[4] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 03期

关键词：

EQUATION-OF-STATE; MASS-RADIUS RELATION; SYMMETRY ENERGY; CONSTRAINTS; MATTER;

D O I：

10.1103/PhysRevLett.114.031103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It has been conjectured that the velocity of sound in any medium is smaller than the velocity of light in vacuum divided by root 3. Simple arguments support this bound in nonrelativistic and/or weakly coupled theories. The bound has been demonstrated in several classes of strongly coupled theories with gravity duals and is saturated only in conformal theories. 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.

引用

页数：5

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