I was looking for references on the quadrupolar formula and found this http://adsabs.harvard.edu/full/1992Ap&SS.194..159Y". I was so shocked to find that it had actually been published (although it was nearly 20 years ago) that I had to post this warning that there is a fundamental flaw in the paper.(adsbygoogle = window.adsbygoogle || []).push({});

In the paper, the author discusses the quadrupolar formula which has been used to derive the orbital speed-up of a binary star system. This orbital speed-up has been measured with good accuracy for the binary pulsar system PSR 1913 + 16. The author then goes on to try to demonstrate that the energy loss is zero through a gross misuse of the continuity equation for the linearized Einstein equations, [tex] \partial_\mu T^{\mu\nu} = 0[/tex]. In fact, the author assumes that the continuity equation implies that bodies travel in straight lines as the third section of this letter shows.

Anyone familiar with Newtonian mechanics or electromagnetism knows this is false. The continuity equation is underspecified and the field equations give the rest of the motion. For example, in electromagnetism we have [tex] \partial_\mu J^{\mu} = 0[/tex] for a current. In this we have one equation and four unknowns with Maxwell's equations providing the rest of the specification of the current. In the continuity equation for GR, there are four equations and ten unknowns and straight line motion is only one of infinite solutions.

I think it's a good illustration of the kinds of basic mistakes that people can make and that just because something is published in a journal does not mean it can be trusted.

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# Do not believe this letter on gravitational radiation

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