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• W3098848328 abstract "We consider the question of determining the optical drift effects in general relativity, i.e. the rate of change of the apparent position, redshift, Jacobi matrix, angular distance and luminosity distance of a distant object as registered by an observer in an arbitrary spacetime. We present a fully relativistic and covariant approach, in which the problem is reduced to a hierarchy of ODE's solved along the line of sight. The 4-velocities and 4-accelerations of the observer and the emitter and the geometry of the spacetime along the line of sight constitute the input data. We build on the standard relativistic geometric optics formalism and extend it to include the time derivatives of the observables. In the process we obtain two general, non-perturbative relations: the first one between the gravitational lensing, represented by the Jacobi matrix, and the apparent position drift, also called the cosmic parallax, and the second one between the apparent position drift and the redshift drift. The applications of the results include the theoretical study of the drift effects of cosmological origin (so-called real-time cosmology) in numerical or exact Universe models." @default.
• W3098848328 created "2020-11-23" @default.
• W3098848328 creator A5001923693 @default.
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• W3098848328 date "2018-03-08" @default.
• W3098848328 modified "2023-10-12" @default.
• W3098848328 title "Optical drift effects in general relativity" @default.
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• W3098848328 doi "https://doi.org/10.1088/1475-7516/2018/03/012" @default.
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