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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-30897

Kannan, R; Saha, P (2009). Frame-dragging and the kinematics of galactic-center stars. Astrophysical Journal, 690(2):1553-1557.

Accepted Version


We calculate the effects of frame dragging on the Galactic-Center stars. Assuming the stars are only slightly relativistic, we derive an approximation to the Kerr metric, which turns out to be a weak-field Schwarzschild metric plus a frame-dragging term. By numerically integrating the resulting geodesic equations, we compute the effect on Keplerian elements and the kinematics. We find that the kinematic effect at pericenter passage is proportional to (a(1 – e 2))–2. For known Galactic-center stars it is of order 10 m s–1. If observed, this would provide a measurement of the spin of the black hole.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
DDC:530 Physics
Date:January 2009
Deposited On:25 Feb 2010 16:48
Last Modified:27 Nov 2013 16:46
Publisher:Institute of Physics Publishing
Publisher DOI:10.1088/0004-637X/690/2/1553
Related URLs:http://arxiv.org/abs/0809.1866
Citations:Web of Science®. Times Cited: 10
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Scopus®. Citation Count: 9

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