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Gravitational-wave bursts from the nuclei of distant galaxies and quasars - Proposal for detection using Doppler tracking of interplanetary spacecraft
Thorne, K. S.; Braginskii, V. B.
AA(California Institute of Technology, Pasadena, Calif.), AB(Moskovskii Gosudarstvennyi Universitet, Moscow, USSR)
Astrophysical Journal, vol. 204, Feb. 15, 1976, pt. 2, p. L1-L6. Research supported by the Ministerstvo Vysshego i Srednego Spetsial'nogo Obrazovaniia (ApJL Homepage)
Publication Date:
NASA/STI Keywords:
Doppler Effect, Galactic Nuclei, Galactic Radiation, Gravitational Waves, Interplanetary Spacecraft, Quasars, Spacecraft Tracking, Radiation Detectors, Radio Sources (Astronomy), Space Detection And Tracking System, Spacecraft Communication
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It is argued that the collapse which forms the supermassive black holes that are likely to exist in the nuclei of many quasars and galaxies, and collisions between those holes, should produce strong broadband bursts of gravitational waves. The mean time between such gravitational-wave bursts at earth is analyzed in terms of the present Hubble expansion rate, the present deceleration parameter of the universe, the redshift z = 2.5 (at which most of the bursts are assumed to have been generated), the present number density of 'centers' where the bursts originated, the mean number of bursts generated in each center during its active life, and the speed of light. The analysis shows that the range from one week to 300 years is reasonable for the time between bursts, although it is admitted that hardly any bursts at all is also reasonable. Expected characteristics of the bursts are deduced, and it is shown that the best detector for these bursts will probably be Doppler tracking of one or more interplanetary spacecraft.

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