Fake signals caused by heavy mass motions near a sensitive spherical gravitational wave antenna

Details Fake signals caused by heavy mass motions near a sensitive spherical gravitational wave antenna Fake signals caused by heavy mass motions near a sensitive spherical gravitational wave antenna

2002-06-13

arxiv.org/abs/gr-qc/0206038v1

Class.Quant.Grav. 19 (2002) 4845-4854

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 4 EPS figures, LaTeX2e, IOP style files, submitted to CQG

Scientific paper

10.1088/0264-9381/19/19/304

This paper analyses in quantitative detail the effect caused by a moving mass on a spherical gravitational wave detector. This applies to situations where heavy traffic or similar disturbances happen near the GW antenna. Such disturbances result in quadrupole tidal stresses in the antenna mass, and they therefore precisely fake a real gravitational signal. The study shows that there always are characteristic frequencies, depending on the motion of the external masses, at which the fake signals are most intense. It however appears that, even at those frequencies, fake signals should be orders of magnitude below the sensitivity curve of an optimised detector, in likely realistic situations.

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