Physics
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977nciml..19..249r&link_type=abstract
Nuovo Cimento, Lettere, vol. 19, June 18, 1977, p. 249, 250.
Physics
3
Einstein Equations, Field Theory (Physics), Gravitational Waves, Coupling, Electromagnetic Fields, Gravitation Theory, Gravitational Fields, Gravitons, Relativity, Symmetry
Scientific paper
It is generally assumed that retarded-potential solutions to the Einstein field equations for the gravitational field of an oscillating source in the linear weak-field approximation are correct for describing the emission of gravitational radiation by the source. The use of the fundamental time-symmetric solution to the Einstein field equations in the cases of electromagnetism and gravitation is discussed along with consequences of adopting that solution in the case of gravitation. It is argued that since the coupling between a proton and a gravitational field is very much smaller than that between a proton and an electromagnetic field, all the matter in the universe is not enough to absorb the outgoing gravitational radiation of an oscillating source. It is concluded that the gravitational field of a given source should be described by means of the time-symmetric solution to the field equations, that a physical system undergoing periodic motion will be surrounded by a gravitational field in the form of standing waves and not lose energy as gravitational radiation, and that there are no free periodic gravitational waves or gravitons in nature.
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