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GR: Fachverband Gravitation und Relativitätstheorie

GR 11: Relativistic Astrophysics

GR 11.2: Vortrag

Dienstag, 18. März 2014, 15:05–15:25, SPA SR220

The I-Q relation for rapidly rotating neutron stars — •Norman Gürlebeck¹, Sayan Chakrabarti², Térence Delsate³, and Jan Steinhoff⁴ — ¹ZARM, University of Bremen, Am Fallturm, 28359 Bremen, Germany — ²Department of Physics, Indian Institute of Technology Guwahati, North Guwahati, 781039, Assam, India — ³Université de Mons, Place du Parc 20, 7000 Mons, Belgium — ⁴CENTRA, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal

We discuss universal relations between the moment of inertia and the quadrupole moment of arbitrarily fast rotating neutron stars. These relations are independent of the equation of state and they were first discussed in a slow rotation approximation. However, recent studies suggested that these relations break down for fast rotations. Nonetheless, we consider the dependence of the relation on different dimensionless parameters characterizing the magnitude of rotation, thereby, restoring their universality among various suggested equations of state.