On the Speed of Gravity and the Jupiter/Quasar Measurement

Astronomy and Astrophysics – Astrophysics

Scientific paper

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LaTeX (or Latex, etc), two figures, which are also available at http://www-theory.lbl.gov/~samuel/figure1.pdf and http://www

Scientific paper

10.1142/S0218271804005900

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 v_J/c correction to the gravitational time delay difference relevant to the experiment is derived, where v_J is the speed of Jupiter as measured from Earth. Since the v_J/c corrections are too small to have been measured in the Jupiter/quasar experiment, it is impossible that the speed of gravity was extracted from the data, and I explain what when wrong with the data analysis. Finally, mistakes are shown in papers by Fomalont and Kopeikin intended to rebut my work and the work of others.

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