Bremen 2017 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 11: Gravitationswellen

GR 11.2: Vortrag

Mittwoch, 15. März 2017, 17:50–18:10, SFG 0140

Astrophysical Gravitational Waves in Conformal Gravity — •Patric Hölscher¹, Chiara Caprini², and Dominik Schwarz¹ — ¹Bielefeld University, Bielefeld, Germany — ²Astroparticle and Cosmology laboratory, Paris, France

We investigate the gravitational radiation from binary systems in Conformal Gravity and Massive Conformal Gravity. Therefore, we derive the inhomogeneous linearized field equations for the metric which are given by a massive Klein-Gordon equation.

To calculate the radiated energy we follow the standard method by deriving an expression for the gravitational energy-momentum tensor. In order to explain the decrease of the orbital period of binary systems we use data from the analysis of galaxy rotation curves and from the well-measured binary system PSRJ1012+5307.

Our result is that there is nearly no decrease of the orbital period. This means that gravitational radiation is not effective and there has to be another mechanism to explain the shrinkage of the orbital period of binary systems.