Massive neutron stars with quark-hybrid matter core

MILVA ORSARIA; FRIDOLIN WEBER; HILARIO RODRIGUEZ; GUSTAVO CONTRERA

Denver, Colorado

Congreso; the APR13 Meeting of The American Physical Society; 2013

American Physical Society

Using a nonlocal extension of the SU(3) Nambu-Jona Lasinio model, which reproduces several of the key features of Quantum Chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1 M_sun. According to our study, the implications for the recently discovered, massive neutron star PSR J1614-2230, whose gravitational mass is 1.97±0.04 M_sun, are that this neutron star may contain an extended region of quark-hybrid matter at it center, but no pure quark matter.