Global Disk Oscillation Modes in Cataclysmic Variables and Other Newtonian Accretors
artículo original
Fecha
2007Autor
Ortega Rodríguez, Manuel
Wagoner, Robert V.
Metadatos
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Diskoseismology, the theoretical study of small adiabatic hydrodynamical
global perturbations of geometrically thin, optically thick accretion disks around
black holes (and other compact objects), is a potentially powerful probe of the
gravitational field. For instance, the frequencies of the normal mode oscillations
can be used to determine the elusive angular momentum parameter of the black
hole. The general formalism developed by diskoseismologists for relativistic sys-
tems can be readily applied to the Newtonian case of cataclysmic variables (CVs).
Some of these systems (e.g., the dwarf nova SS Cygni) show rapid oscillations in
the UV with periods of tens of seconds and high coherence. In this paper, we
assess the possibility that these dwarf nova oscillations (DNOs) are diskoseismic
modes. Besides its importance in investigating the physical origin of DNOs, the
present work could help us to answer the following question. To what extent
are the similarities in the oscillation phenomenology of CVs and X-ray binaries
(XRBs) indicative of a common physical mechanism?
External link to the item
10.1086/521419Colecciones
- Meteorología [509]