Excitation of the earth's eigenvibrations by gravitational radiation from astrophysical sources

Details Excitation of the earth's eigenvibrations by gravitational radiation from astrophysical sources Excitation of the earth's eigenvibrations by gravitational radiation from astrophysical sources

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ncimc...6...49b&link_type=abstract

Nuovo Cimento C, Serie 1, vol. 6, Jan.-Feb. 1983, p. 49-71.

Astronomy and Astrophysics

Astrophysics

1

Astrophysics, Earth Motion, Gravimetry, Gravitational Waves, Radiation Sources, Binary Stars, Black Holes (Astronomy), Quadrupoles, Supernovae

Scientific paper

During the past two decades, attempts have been made to detect gravitational radiation by means of seismographs, cryogenic gravity meters, and Weber wave antennas. Up to now, all efforts to detect gravitational signals with seismographs have failed. Since the earth has eigenmodes with significant mass quadrupole, Weber (1967) has suggested to treat the whole earth as a detector of gravitational waves. These waves will then excite the earth's eigenvibrations by quadrupole interaction. In such a case, the cryogenic wave antenna will act simply as a superstrainmeter. The failure to detect gravitational radiation with currently available detectors means that detector sensitivity must be increased. It is expected that the cryogenic wave antenna will be improved within the next few years to make it capable to detect signals with a strength h which is approximately equal to 10 to the -20th. It is thought that signals with this strength are reaching earth from various astrophysical sources in the Galaxy.

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