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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Relativistic Astrophysics

GR 10.5: Vortrag

Donnerstag, 3. März 2016, 12:20–12:40, VMP6 HS A

Quasi-normal modes of realistic neutron stars in Einstein-Gauss-Bonnet-dilaton theory — •Jose Luis Blazquez Salcedo — Oldenburg University ,Oldenburg, Germany

In this talk we present our results on quasi-normal modes (QNM) of realistic neutron stars in Einstein-Gauss-Bonnet-dilaton (EGBd) gravity. We consider 8 realistic equations of state for nuclear, hyperonic, and hybrid matter. We focus on the fundamental curvature mode of the axial component, and compare the results with those of pure Einstein theory. Our results show that the QNM of neutron stars in EGBd theory present higher frequencies than the QNM of stars in Einstein theory. On the other hand, the impact on the damping time of the Gauss-Bonnet-dilaton term is typically smaller. We study universal relations for the QNM spectrum of these configurations, and obtain that relations valid in pure Einstein theory are also valid in EGBd gravity. We will explain how these results could be used to constraint the EGBd parameters using gravitational wave detections.