Header

UZH-Logo

Maintenance Infos

Frame-dragging and the kinematics of galactic-center stars


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

Abstract

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.

Abstract

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.

Statistics

Citations

Dimensions.ai Metrics
17 citations in Web of Science®
15 citations in Scopus®
15 citations in Microsoft Academic
Google Scholar™

Altmetrics

Downloads

45 downloads since deposited on 25 Feb 2010
3 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:January 2009
Deposited On:25 Feb 2010 16:48
Last Modified:18 Feb 2018 00:21
Publisher:Institute of Physics Publishing
ISSN:0004-637X
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1088/0004-637X/690/2/1553
Related URLs:http://arxiv.org/abs/0809.1866

Download

Download PDF  'Frame-dragging and the kinematics of galactic-center stars'.
Preview
Content: Accepted Version
Filetype: PDF
Size: 1MB
View at publisher