On gravitomagnetic precession around black holes

We compute exactly the frequency of Lense—Thirring precession for point masses in the Kerr metric, for arbitrary black hole mass and specific angular momentum. We show that this frequency, for point masses at or close to the innermost stable orbit, and for holes with moderate to extreme rotation, is...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 1999-03, Vol.304 (1), p.155-159
Hauptverfasser: Merloni, A., Vietri, M., Stella, L., Bini, D.
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Sprache:eng
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Zusammenfassung:We compute exactly the frequency of Lense—Thirring precession for point masses in the Kerr metric, for arbitrary black hole mass and specific angular momentum. We show that this frequency, for point masses at or close to the innermost stable orbit, and for holes with moderate to extreme rotation, is less than, but comparable to, the rotation frequency. Thus, if the quasi-periodic oscillations (QPOs) observed in the modulation of the X-ray flux from some black hole candidates (BHCs) are caused by Lense—Thirring precession of orbiting material, we predict that a separate, distinct QPO ought to be observed in each object.
ISSN:0035-8711
1365-2966
DOI:10.1046/j.1365-8711.1999.02307.x