Pentcho Valev
2018-01-01 17:26:33 UTC
"In general relativity and other metric theories of gravity, though, the Shapiro delay for gravitational waves is expected to be the same as that for light and neutrinos. However, in theories such as tensor-vector-scalar gravity and other modified GR theories which reproduce Milgrom's law and avoid the need for dark matter, the Shapiro delay for gravitational waves is much smaller than that for neutrinos or photons. The observed 1.7 second difference in arrival times seen between gravitational wave and gamma ray arrivals from neutron star merger GW170817 was far less than the estimated Shapiro delay of about 1000 days. This rules out a class of modified models of gravity which dispense with the need for dark matter." https://en.m.wikipedia.org/wiki/Shapiro_delay
General relativity says nothing about the speed of gravitational waves so "in general relativity ... the Shapiro delay for gravitational waves is expected to be the same as that for light and neutrinos" is a blatant lie.
It was Eddington who "discovered", in 1922, that some of the gravitational waves travel at the speed of light:
Arthur Eddington 1922: "The problem of the propagation of disturbances of the gravitational field was investigated by Einstein in 1916, and again in 1918. It has usually been inferred from his discussion that a change in the distribution of matter produces gravitational effects which are propagated with the speed of light; but I think that Einstein really left the question of the speed of propagation rather indefinite. His analysis shows how the co-ordinates must be chosen if it is desired to represent the gravitational potentials as propagated with the speed of light; but there is nothing to indicate that the speed of light appears in the problem, except as the result of this arbitrary choice. [...] Weyl has classified plane gravitational waves into three types, viz.: (1) longitudinal-longitudinal; (2)longitudinal-transverse; (3) transverse-transverse. The present investigation leads to the conclusion that transverse-transverse waves are propagated with the speed of light in all systems of co-ordinates. Waves of the first and second types have no fixed velocity - a result which rouses suspicion as to their objective existence." http://rspa.royalsocietypublishing.org/content/royprsa/102/716/268.full.pdf
Eddington's "discovery" that gravitational waves travel at the speed of light was actually his third major hoax. Here are the other two:
Sabine Hossenfelder: "As light carries energy and is thus subject of gravitational attraction, a ray of light passing by a massive body should be slightly bent towards it. This is so both in Newton's theory of gravity and in Einstein's, but Einstein's deflection is by a factor two larger than Newton's. [...] As history has it, Eddington's original data actually wasn't good enough to make that claim with certainty. His measurements had huge error bars due to bad weather and he also might have cherry-picked his data because he liked Einstein's theory a little too much. Shame on him." http://backreaction.blogspot.com/2015/04/a-wonderful-100th-anniversary-gift-for.html
Stephen Hawking: "Einsteins prediction of light deflection could not be tested immediately in 1915, because the First World War was in progress, and it was not until 1919 that a British expedition, observing an eclipse from West Africa, showed that light was indeed deflected by the sun, just as predicted by the theory. This proof of a German theory by British scientists was hailed as a great act of reconciliation between the two countries after the war. It is ionic, therefore, that later examination of the photographs taken on that expedition showed the errors were as great as the effect they were trying to measure. Their measurement had been sheer luck, or a case of knowing the result they wanted to get, not an uncommon occurrence in science." http://www.balajisebookworld.com/Ebooks/a.html
Discover Magazine: "The eclipse experiment finally happened in 1919. Eminent British physicist Arthur Eddington declared general relativity a success, catapulting Einstein into fame and onto coffee mugs. In retrospect, it seems that Eddington fudged the results, throwing out photos that showed the wrong outcome. No wonder nobody noticed: At the time of Einstein's death in 1955, scientists still had almost no evidence of general relativity in action." http://discovermagazine.com/2008/mar/20-things-you-didn.t-know-about-relativity
"Consider the case of astronomer Walter Adams. In 1925 he tested Einstein's theory of relativity by measuring the red shift of the binary companion of Sirius, brightest star in the sky. Einstein's theory predicted a red shift of six parts in a hundred thousand; Adams found just such an effect. A triumph for relativity. However, in 1971, with updated estimates of the mass and radius of Sirius, it was found that the predicted red shift should have been much larger – 28 parts in a hundred thousand. Later observations of the red shift did indeed measure this amount, showing that Adams' observations were flawed. He "saw" what he had expected to see." http://puritanreformed.blogspot.bg/2010/08/fallible-nature-of-supposed-objective.html
"In January 1924 Arthur Eddington wrote to Walter S. Adams at the Mt. Wilson Observatory suggesting a measurement of the "Einstein shift" in Sirius B and providing an estimate of its magnitude. Adams' 1925 published results agreed remarkably well with Eddington's estimate. Initially this achievement was hailed as the third empirical test of General Relativity (after Mercury's anomalous perihelion advance and the 1919 measurement of the deflection of starlight). It has been known for some time that both Eddington's estimate and Adams' measurement underestimated the true Sirius B gravitational redshift by a factor of four." http://adsabs.harvard.edu/abs/2010AAS...21530404H
"...Eddington asked Adams to attempt the measurement. [...] ...Adams reported an average differential redshift of nineteen kilometers per second, very nearly the predicted gravitational redshift. Eddington was delighted with the result... [...] In 1928 Joseph Moore at the Lick Observatory measured differences between the redshifts of Sirius and Sirius B... [...] ...the average was nineteen kilometers per second, precisely what Adams had reported. [...] More seriously damaging to the reputation of Adams and Moore is the measurement in the 1960s at Mount Wilson by Jesse Greenstein, J.Oke, and H.Shipman. They found a differential redshift for Sirius B of roughly eighty kilometers per second." http://adsabs.harvard.edu/full/1980QJRAS..21..246H
Pentcho Valev
General relativity says nothing about the speed of gravitational waves so "in general relativity ... the Shapiro delay for gravitational waves is expected to be the same as that for light and neutrinos" is a blatant lie.
It was Eddington who "discovered", in 1922, that some of the gravitational waves travel at the speed of light:
Arthur Eddington 1922: "The problem of the propagation of disturbances of the gravitational field was investigated by Einstein in 1916, and again in 1918. It has usually been inferred from his discussion that a change in the distribution of matter produces gravitational effects which are propagated with the speed of light; but I think that Einstein really left the question of the speed of propagation rather indefinite. His analysis shows how the co-ordinates must be chosen if it is desired to represent the gravitational potentials as propagated with the speed of light; but there is nothing to indicate that the speed of light appears in the problem, except as the result of this arbitrary choice. [...] Weyl has classified plane gravitational waves into three types, viz.: (1) longitudinal-longitudinal; (2)longitudinal-transverse; (3) transverse-transverse. The present investigation leads to the conclusion that transverse-transverse waves are propagated with the speed of light in all systems of co-ordinates. Waves of the first and second types have no fixed velocity - a result which rouses suspicion as to their objective existence." http://rspa.royalsocietypublishing.org/content/royprsa/102/716/268.full.pdf
Eddington's "discovery" that gravitational waves travel at the speed of light was actually his third major hoax. Here are the other two:
Sabine Hossenfelder: "As light carries energy and is thus subject of gravitational attraction, a ray of light passing by a massive body should be slightly bent towards it. This is so both in Newton's theory of gravity and in Einstein's, but Einstein's deflection is by a factor two larger than Newton's. [...] As history has it, Eddington's original data actually wasn't good enough to make that claim with certainty. His measurements had huge error bars due to bad weather and he also might have cherry-picked his data because he liked Einstein's theory a little too much. Shame on him." http://backreaction.blogspot.com/2015/04/a-wonderful-100th-anniversary-gift-for.html
Stephen Hawking: "Einsteins prediction of light deflection could not be tested immediately in 1915, because the First World War was in progress, and it was not until 1919 that a British expedition, observing an eclipse from West Africa, showed that light was indeed deflected by the sun, just as predicted by the theory. This proof of a German theory by British scientists was hailed as a great act of reconciliation between the two countries after the war. It is ionic, therefore, that later examination of the photographs taken on that expedition showed the errors were as great as the effect they were trying to measure. Their measurement had been sheer luck, or a case of knowing the result they wanted to get, not an uncommon occurrence in science." http://www.balajisebookworld.com/Ebooks/a.html
Discover Magazine: "The eclipse experiment finally happened in 1919. Eminent British physicist Arthur Eddington declared general relativity a success, catapulting Einstein into fame and onto coffee mugs. In retrospect, it seems that Eddington fudged the results, throwing out photos that showed the wrong outcome. No wonder nobody noticed: At the time of Einstein's death in 1955, scientists still had almost no evidence of general relativity in action." http://discovermagazine.com/2008/mar/20-things-you-didn.t-know-about-relativity
"Consider the case of astronomer Walter Adams. In 1925 he tested Einstein's theory of relativity by measuring the red shift of the binary companion of Sirius, brightest star in the sky. Einstein's theory predicted a red shift of six parts in a hundred thousand; Adams found just such an effect. A triumph for relativity. However, in 1971, with updated estimates of the mass and radius of Sirius, it was found that the predicted red shift should have been much larger – 28 parts in a hundred thousand. Later observations of the red shift did indeed measure this amount, showing that Adams' observations were flawed. He "saw" what he had expected to see." http://puritanreformed.blogspot.bg/2010/08/fallible-nature-of-supposed-objective.html
"In January 1924 Arthur Eddington wrote to Walter S. Adams at the Mt. Wilson Observatory suggesting a measurement of the "Einstein shift" in Sirius B and providing an estimate of its magnitude. Adams' 1925 published results agreed remarkably well with Eddington's estimate. Initially this achievement was hailed as the third empirical test of General Relativity (after Mercury's anomalous perihelion advance and the 1919 measurement of the deflection of starlight). It has been known for some time that both Eddington's estimate and Adams' measurement underestimated the true Sirius B gravitational redshift by a factor of four." http://adsabs.harvard.edu/abs/2010AAS...21530404H
"...Eddington asked Adams to attempt the measurement. [...] ...Adams reported an average differential redshift of nineteen kilometers per second, very nearly the predicted gravitational redshift. Eddington was delighted with the result... [...] In 1928 Joseph Moore at the Lick Observatory measured differences between the redshifts of Sirius and Sirius B... [...] ...the average was nineteen kilometers per second, precisely what Adams had reported. [...] More seriously damaging to the reputation of Adams and Moore is the measurement in the 1960s at Mount Wilson by Jesse Greenstein, J.Oke, and H.Shipman. They found a differential redshift for Sirius B of roughly eighty kilometers per second." http://adsabs.harvard.edu/full/1980QJRAS..21..246H
Pentcho Valev