Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gregr..17..173w&link_type=abstract
General Relativity and Gravitation (ISSN 0001-7701), vol. 17, Feb. 1985, p. 173-177.
Astronomy and Astrophysics
Astronomy
1
Clock Paradox, Gravitational Fields, Pulsars, Red Shift, Relativity, Stellar Rotation, Binary Stars, Black Holes (Astronomy), Nonlinear Equations
Scientific paper
A new class of ideal clocks within general relativity is described. They are self-gravitating systems such as rotating stars, rotating black holes, and binary star systems. The gravitational redshift of the observed period of rotation of such clocks in a given weak external gravitational field is shown to be the same as that of an ideal atomic clock. Because the clocks have structure and dynamics determined by gravitational interactions, the full nonlinear machinery of general relativity must be used. This result is important for the binary pulsar PSR 1913 + 16, where the gravitational redshift of the pulsar's frequency caused by the companion's gravitational field is an observable effect.
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