Bremen 2017 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 6: Relativistische Astrophysik

GR 6.1: Talk

Tuesday, March 14, 2017, 14:00–14:20, SFG 0140

The gravitomagnetic clock effect — •Eva Hackmann and Claus Lämmerzahl — ZARM, Universität Bremen

In General Relativity the rotation of a gravitating object causes purely relativistic effects on the motion of orbiting test particles, which are often referred to as frame dragging or gravitomagnetic effects. Here we will discuss a frame dragging effect on clocks first introduced by Cohen and Mashoon (Phys. Lett. A 181, 353 (1993)) as the difference in proper time as measured by two clocks, one on a prograde and one on a retrograde equatorial circular orbit, after a revolution of 2π. A generalisation of this effect to arbitrary geodesic motion of the two clocks allows to consider much more general settings. In particular, we will discuss this effect for two pulsars orbiting Sagittarius A*, the supermassive black hole in the center of our galaxy.