Physics – Nuclear Physics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..69..348l&link_type=abstract
Nuclear Physics B Proceedings Supplements, Volume 69, Issue 1-3, p. 348-351.
Physics
Nuclear Physics
Scientific paper
We review the relativistic results for diskoseismic modes of oscillation which are trapped within thin accretion disks by non-Newtonian gravitational properties of a black hole. Predicted frequencies are calculated for the potentially most observable modes, ``internal gravity'' modes and ``corrugation'' modes. The most definitive property of these two classes of modes is that the resulting eigenfrequencies depend almost entirely upon only the mass and angular momentum of the black hole. Such features may have been detected by RXTE in the power spectra of the luminosity modulations of the two galactic microquasars, GRS 1915+105 and GRO J1655-40. In the former system, we consider the possibility that this 67Hz feature can be attributed to a g-mode in an accretion disk about a 10.6Msolar (nonrotating) to 36.3Msolar (maximally rotating) black hole. In the latter system, identification of the fundamental g-mode with the 300Hz feature implies a black hole angular momentum approximately 93% of maximum.
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