Comments on the Paper by S. Samuel " on the Speed of Gravity and the Jupiter/quasar Measurement "
نویسنده
چکیده
Recent review article by S. Samuel ”On the speed of gravity and the Jupiter/Quasar measurement” published in the International Journal of Modern Physics D, 13 (2004) 1753, provides the reader with a misleading ”theory” of the relativistic time delay in general theory of relativity. Furthermore, it misquotes original publications by Kopeikin and Fomalont & Kopeikin related to the measurement of the speed of gravity by VLBI. We summarize the general relativistic principles of the Lorentz-invariant theory of propagation of light in time-dependent gravitational field, derive Lorentz-invariant expression for the relativistic time delay, and finally explain why Samuel’s ”theory” is conceptually incorrect and confuses the speed of gravity with the speed of light.
منابع مشابه
On the Speed of Gravity and the Jupiter/quasar Measurement
I present the theory and analysis behind the experiment by Fomalont and Kopeikin involving Jupiter and quasar J0842+1845 that purported to measure the speed of gravity. The computation of the vJ/c correction to the gravitational time delay difference relevant to the experiment is derived, where vJ is the speed of Jupiter as measured from Earth. Since the vJ/c corrections are too small to have b...
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تاریخ انتشار 2005