September 27, 2015 to October 3, 2015
Kobe, Fashion Mart, Japan
Japan timezone

QCD constraints on the equation of state for compact stars

Sep 30, 2015, 9:20 AM
Convention room 1

Convention room 1

Contributed talk Quark Matter in Astrophysics Quark Matter in Astrophysics


Eduardo Fraga (Universidade Federal do Rio de Janeiro)


In recent years, there have been several successful attempts to constrain the equation of state of neutron star matter using input from low-energy nuclear physics and observational data. We demonstrate that significant further restrictions can be placed by additionally requiring the pressure to approach that of deconfined quark matter at high densities. Remarkably, the new constraints turn out to be highly insensitive to the amount - or even presence - of quark matter inside the stars. In this framework, we also present a simple effective equation of state for cold quark matter that consistently incorporates the effects of interactions and furthermore includes a built-in estimate of the inherent systematic uncertainties. This goes beyond the MIT bag model description in a crucial way, yet leads to an equation of state that is equally straightforward to use.

Primary authors

Aleksi Vuorinen Eduardo Fraga (Universidade Federal do Rio de Janeiro) Eero Aleksi Kurkela (CERN) Juergen Schaffner-Bielich (Frankfurt University)

Presentation materials