Resonant Excitation of White Dwarf Oscillations in Compact Object Binaries

Details Resonant Excitation of White Dwarf Oscillations in Compact Object Binaries Resonant Excitation of White Dwarf Oscillations in Compact Object Binaries

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.7605r&link_type=abstract

American Astronomical Society Meeting 205, #76.05; Bulletin of the American Astronomical Society, Vol. 36, p.1473

Astronomy and Astrophysics

Astronomy

Scientific paper

White dwarfs are extremely common, and there are quite a few black holes (we think) in the observed universe. Encounters between white dwarfs and black holes therefore appear inevitable. We consider some possible consequences of the formation of such white dwarf-compact object (WDCO) binaries. As a WDCO binary inspirals under gravitational radiation, there will be resonances when harmonics of the orbital frequency match the white dwarf oscillation eigenfrequencies. As a result, there can be resonant energy transfer from the orbit to the white dwarf normal modes. The problem is complicated by the fact that the excited modes will, in turn, perturb the orbit. In this way, the modes will influence their own excitation. After passage through a sequence of such resonances, the normal mode amplitudes may become non-linear. Possible observable consequences of this scenario will be discussed.

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