Reference Frame in General Relativity

Details Reference Frame in General Relativity Reference Frame in General Relativity

2004-05-06

arxiv.org/abs/gr-qc/0405027v3

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

English text - 25 pages; Russian text - 27 pages

Scientific paper

A reference frame in event space is a smooth field of orthonormal bases. Every reference frame is equipped by anholonomic coordinates. Using anholonomic coordinates allows to find out relative speed of two observers and appropriate Lorentz transformation. Synchronization of a reference frame is an anholonomic time coordinate. Simple calculations show how synchronization influences time measurement in the vicinity of the Earth. Measurement of Doppler shift from the star orbiting the black hole helps to determine mass of the black hole. According observations of Sgr A, if non orbiting observer estimates age of S2 about 10 Myr, this star is 0.297 Myr younger.

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