Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.316..576h&link_type=abstract
Nature (ISSN 0028-0836), vol. 316, Aug. 15, 1985, p. 576, 577.
Astronomy and Astrophysics
Astronomy
1
Gravitational Wave Antennas, Laser Interferometry, Measuring Instruments, Binary Stars, Black Holes (Astronomy), Gravitational Collapse, Neutron Stars, Pulsars
Scientific paper
Various feasible detectors for gravity waves from a variety of sources are surveyed. Detectors based on earth look very promising for frequencies above several tens of Hertz (e.g., gravity waves caused by stellar collapses), but are limited at low frequencies by the effets of seismic and man-made noise. At very low frequencies, one cycle per year or lower, pulsar timing is useful. In the long term, laser interferometry between test masses in satellites spaced a million km or more apart looks very promising, with a potential sensitivity of about 10 to the -21 at frequencies below 0.1 Hz. In the shorter term, Bragnisky and Thorne (1985) have proposed a 'sky-hook' detector which would have an amplitude sensitivity of 3 x 10 to the 17th at frequencies of 0.1-0.01 Hz, ideal for searching for the radiation from a black hole-white dwarf binary system. Current ground-based techniques are also discussed.
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