Weber (1968) suggested to consider the Earth as a gravitational wave detector in the millihertz band. Since then many authors have elaborated on both theoretical and observational aspects of the problem(Dyson 1969, Ashby and Dreitlein 1975). In quest for still lower frequencies in the microhertz regions, Mashhoon and his collaborators studied the secular changes in the orbital parameters of binaries and in the Earth-Moon and Earth-Mars distances (Mashhoon 1979, Mashhoon et al. 1981, Anderson & Mashhoon 1985).
In this paper we study excitation of the normal modes of a star by gravitational waves. The behavior of the and modes of oscillation and details of their coupling to gravitational waves are analyzed. The cross section for resonant absorption of the wave energy are calculated. Numerical values are given for several modes of polytropic models.
© European Southern Observatory (ESO) 1997
Online publication: June 30, 1998