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Astron. Astrophys. 321, 1024-1026 (1997)

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7. Concluding remarks

The gravitational radiation, being a quadrupole one and derivable from a scalar potential excites only the second order harmonic modes of the star and that only through the irrotational component, [FORMULA]. Therefore, the [FORMULA] -modes with small irrotational components present much smaller absorption cross sections to the gravitational radiation than the [FORMULA] modes. In the [FORMULA] sequence the cross section decreases as the mode order goes up. It is largest for [FORMULA], commonly known as the fundamental mode in Cowling's (1941) terminology. See Table 1 for these behaviors. The analysis following Eq. (9) was carried out for a (+) polarized radiation. The result for a ([FORMULA]) polarization and, consequently, for unpolarized radiation will, however, be the same.

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© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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