Feb 12, 1999
Probing Black Holes via Diskoseismology
Dr. Robert Wagoner, ITP & Stanford Univ
This is an overview of the results of calculations of the eigenfunctions
and eigenfrequencies of norml modes of oscillation trapped within the inner
region of their accretion disk by the strong-field gravitational properties of a
black hole (or a weakly magnetized neutron star). The focus will be on the most
robust class: the analogue of internal gravity modes in stars. Their frequency
which corresponds to the lowest mode numbers depends almost entirely upon only
the mass and angular momentum of the black hole. Such a feature may have been
detected in the X-ray fluctuation power spectra of two galactic "microquasars",
allowing the angular momentum of the black hole to be determined in one case.
astro-ph/9805028
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