Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 67: Nuclear Astrophysics VI
HK 67.5: Vortrag
Freitag, 18. März 2016, 15:15–15:30, S1/01 A02
Moments of inertia of neutron stars — •Svenja Kim Greif1,2, Kai Hebeler1,2, and Achim Schwenk1,2 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH
Neutron stars are unique laboratories for matter at extreme conditions. While nuclear forces provide systematic constraints on properties of neutron-rich matter up to around nuclear saturation density, the composition of matter at high densities is still unknown. Recent precise observations of 2 M⊙ neutron stars made it possible to derive systematic constraints on the equation of state at high densities and also neutron star radii.
Further improvements of these constraints require the observation of even heavier neutron stars or a simultaneous measurement of mass and radius of a single neutron star. Since the precise measurement of neutron star radii is an inherently difficult problem, the observation of moment of inertia of neutron stars provides a promising alternative, since they can be measured by pulsar timing experiments. We present a theoretical framework that allows to calculate moments of inertia microscopically, we show results based on state of the art equations of state and illustrate how future measurements of moments of inertia allow to constrain the equation of state and other properties of neutron stars.
*This work is supported by the ERC Grant No. 307986 STRONGINT.