Close encounter - Tidally-induced non-radial oscillation of a fluid star

Details Close encounter - Tidally-induced non-radial oscillation of a fluid star Close encounter - Tidally-induced non-radial oscillation of a fluid star

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229..457e&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 2, March 1990, p. 457-466. Research supported by the Japan-U.S. Coope

Statistics

Computation

3

Solitary Waves, Star Formation, Stellar Evolution, Stellar Mass, Stellar Oscillations, Binary Stars, Computational Astrophysics, Perturbation Theory, Tides

Scientific paper

The dynamical evolution of a system consisting of a fluid star and a point mass has been investigated by taking account of the finite deformation of the fluid star. The initial relative velocity at infinity is assumed to be nonzero; i.e., an unbound system is treated. When the relative velocity is fixed, the amplitude of the nonradial oscillation (NRO) excited in the fluid depends on the value of the impact parameter. If the impact parameter is rather large, NRO is small enough and the criterion for tidal capture can be obtained using first-order perturbation theory. However, when the impact parameter is small, the amplitude of the NRO becomes large.

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