Astrophysical measurement of the equation of state of neutron star matter
Abstract
We present the first astrophysical measurement of the pressure of cold matter above nuclear saturation density, based on recently determined masses and radii of three neutron stars. The pressure at higher densities is below the predictions of equations of state that account only for nucleonic degrees of freedom, and thus present a challenge to the microscopic theory of neutron star matter.
- Publication:
-
Physical Review D
- Pub Date:
- November 2010
- DOI:
- 10.1103/PhysRevD.82.101301
- arXiv:
- arXiv:1002.3153
- Bibcode:
- 2010PhRvD..82j1301O
- Keywords:
-
- 97.60.Jd;
- 21.65.-f;
- 26.60.Kp;
- Neutron stars;
- Nuclear matter;
- Equations of state of neutron-star matter;
- Astrophysics - High Energy Astrophysical Phenomena;
- General Relativity and Quantum Cosmology;
- Nuclear Theory
- E-Print:
- replaced with the published version