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GR: Fachverband Gravitation und Relativitätstheorie

GR 11: Relativistic Astrophysics

GR 11.3: Vortrag

Mittwoch, 18. März 2015, 16:50–17:10, H 2013

Quadrupole Moments of Rapidly Rotating Compact Objects in Dilatonic Einstein-Gauss- Bonnet Theory — •Sindy Mojica, Burkard Kleihaus, and Jutta Kunz — University of Oldenburg

Rapidly rotating compact objects are considered laboratories to test general relativity and theories beyond. We determined observables such as the mass, the angular momentum, the moment of inertia, or the quadrupole moment for neutron stars and black holes in dilatonic Einstein-Gauss-Bonnet theory, a theory motivated by string theory. We used several equations of state (EOS) for the neutron matter and considered the dependence of the observables on the EOS and on the Gauss-Bonnet coupling constant. While there is a considerable EOS dependence for the observables themselves, the relation between the scaled moments of inertia and the scaled quadrupole moments is almost independent of the EOS, when the scaled angular momentum is held fixed.