High-mass twin stars with a multipolytrope equation of state
- 18 October 2017
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 96 (4), 045809
- https://doi.org/10.1103/physrevc.96.045809
Abstract
We show that in the three-polytrope model of Hebeler et al. [ Astrophys. J. 773, 11 (2013)] for the neutron star equation of state (EoS) at supersaturation densities a third family of compact stars can be obtained which confirms the possibility of high-mass twin stars that have coincident masses and significantly different radii km. We show that the causality constraint puts severe limitations on the maximum mass of the third family sequence which can be relaxed when this scheme is extended to four polytropes thus mimicking a realistic high-density matter EoS.
Funding Information
- Narodowym Centrum Nauki (UMO-2014/13/B/ST9/02621)
- European Cooperation in Science and Technology (MP1304)
This publication has 28 references indexed in Scilit:
- THE NANOGRAV NINE-YEAR DATA SET: MASS AND GEOMETRIC MEASUREMENTS OF BINARY MILLISECOND PULSARSThe Astrophysical Journal, 2016
- Neutron star mass limit at 2M⊙ supports the existence of a CEPThe European Physical Journal A, 2016
- Topical issue on exotic matter in neutron starsThe European Physical Journal A, 2016
- A new quark-hadron hybrid equation of state for astrophysicsAstronomy & Astrophysics, 2015
- Equation of state in ()-flavor QCDPhysical Review D, 2014
- Generic conditions for stable hybrid starsPhysical Review D, 2013
- A Massive Pulsar in a Compact Relativistic BinaryScience, 2013
- A two-solar-mass neutron star measured using Shapiro delayNature, 2010
- On the possibility of stable quark and pion-condensed starsJournal of Physics A: General Physics, 1981
- Equation of State at Supranuclear Densities and the Existence of a Third Family of Superdense StarsPhysical Review B, 1968