Physics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jetp...71..643n&link_type=abstract
Sov. Phys. - JETP, Vol. 71, No. 4, p. 643 - 653
Physics
3
Gravitational Radiation, Gravitational Radiation: Spectra
Scientific paper
The authors obtain the spectrum of gravitational radiation emitted by a classical charge in a circular orbit, in an unbounded orbit and slightly displaced by the field produced by the magnetic moment, and in a combined Coulomb and magnetic-moment field. In the ultrarelativistic limit and the appropriate frequency range, these spectra are proportional to the respective electromagnetic spectra, with a proportionality factor 4πGm2Γ2/e2 that is independent of the frequency, the direction of the wave vector, the specifics of the motion, and the behavior of the field outside the orbit. The authors obtain rough estimates of Γ for an ultrarelativistic charge in an arbitrary field, demonstrating that to order of magnitude, Γ2, is the ratio of the radiative contributions made by nonlocal and local sources. The spectrum of gravitational radiation is derived for a relativistic rotating string with masses at its ends, and it is shown that the masses and the string contribute approximately equally. In the nonrelativistic limit, the harmonics of the radiation from the rotating systems all display the same behavior.
Nikishov A. I.
Ritus V. I.
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