12-18 August 2012
US/Eastern timezone

If you have any questions about the details of the program please contact Bolek Wyslouch

Constraining the Nuclear Equation of State by Neutron-Star Observables

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

Regency 1/3 and Ambassador

Poster Exploring the QCD phase diagram Poster Session Reception

Speaker

Dr Thomas Hell (Technische Universität München)

Description

Recently, the mass of the pulsar PSR J1614-2230 has been measured at a one-percent accuracy to be roughly two solar masses. This, in addition to the statistical analysis of neutron-star radii by Steiner, Lattimer, and Brown lead to tight constraints for the equation of state of dense baryonic matter inside the neutron star. We combine a realistic phenomenological equation of state at low densities with equations of state around nuclear densities derived both from chiral effective field theories, on one hand, and from the Polyakov-loop-extended Nambu--Jona-Lasinio model, on the other. Our analysis based on the Tolman-Oppenheimer-Volkoff equation strongly supports an equation of state of ordinary nuclear matter. This means, that there is no need to include exotic matter in order to stabilize a two-solar mass neutron star. Furthermore, with these constraints we draw conclusions for the QCD phase diagram.

Primary author

Dr Thomas Hell (Technische Universität München)

Co-authors

Prof. Norbert Kaiser (Technische Universität München) Prof. Wolfram Weise (Technische Universität München)

Presentation Materials