Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0136o&link_type=abstract
American Astronomical Society, HEAD meeting #9, #1.36; Bulletin of the American Astronomical Society, Vol. 38, p.334
Astronomy and Astrophysics
Astronomy
Scientific paper
Diskoseismology, the theoretical study of small adiabatic hydrodynamical global perturbations of geometrically thin, optically thick accretion disks around black holes, has been used in the past to allow one to determine the elusive angular momentum parameter of the black hole in terms of the perturbations´ oscillation periods. The procedure consists of a normal mode analysis. The general formalism developed by diskoseismologists for relativistic systems can be readily applied to the Newtonian case of cataclysmic variables. Some of these star-disk systems show rapid oscillations in the UV with periods of tens of seconds and high coherence. We assess the possibility that these dwarf nova oscillations are diskoseismic modes. Besides its importance in investigating the physical origin of dwarf nova oscillations, the present work could help us to answer the following question. To what extent are the similarities in the oscillation phenomenology of cataclysmic variables and X-ray binaries indicative of a common physical mechanism?
Ortega-Rodriguez Manuel
Wagoner Robert V.
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