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LIGO's Gravitational Waves: Needles in a Haystack or Just Fakes?



 
 
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Old October 18th 17, 04:56 PM posted to sci.astro
Pentcho Valev
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Default LIGO's Gravitational Waves: Needles in a Haystack or Just Fakes?

"On 18 March 2016, Harald Pfeiffer, Associate Professor at the Canadian Institute for Theoretical Physics, Toronto, will be honoured with a Bessel Award of the Humboldt Foundation. The award will allow him to stay at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute, AEI) in Potsdam where he will work closely with Prof. Buonanno's division on the prediction of the gravitational waves that are generated when black holes collide. Albert Einstein predicted the existence of gravitational waves 100 years ago. These tiny ripples in space and time are generated when black holes or neutron stars collide. In September 2015, the LIGO observatories detected gravitational waves for the very first time on Earth. The waves they catched from space originated from two black holes that merged 1.3 billion light-years ago in a distant galaxy. Finding the tiny waves, as well as deciphering what was seen, requires detailed knowledge of the expected signals. "We are looking for the needle in the haystack because the signals are buried in the noise", Pfeiffer explains. "But if we know how the needle looks like we have a better chance to find it." Pfeiffer's research on the construction of waveform models for gravitational-wave detectors focuses on numerical simulations — he solves Einstein's equations on supercomputers. Together with his collaborators he is not only looking for one single needle, but for lots of different looking needles: binaries of black holes and/or neutron stars of different masses and spins that generate different looking signals. Pfeiffer's research not only helps us locate black holes in the Universe and determine their size, but his calculations also teach us how space-time behaves when it is warped by black holes." https://astronomynow.com/2016/03/15/...g-black-holes/

This is a blatant lie. LIGO's detections (more precisely, fakes) are MODEL-INDEPENDENT, that is, LIGO conspirators don't use theoretically calculated waveforms in detecting/faking gravitational wave signals:

The Nobel Committee for Physics: "While these waveforms provide a reasonable match, further important improvements are obtained using numerical methods that are very computationally intensive [23]. The analytical methods are crucial to producing the big library of template waveforms used by LIGO. While the waveforms produced in this way are necessary for determining the detailed properties of the objects involved, as well as identifying weak signals, they were not essential for the very first detection of GW150914. This was a model-independent detection of a gravitational-wave transient." https://www.nobelprize.org/nobel_pri...sprize2017.pdf

Rana Adhikari, professor of Physics at Caltech and a member of the LIGO team: "You split it in two and you send it in two separate directions, and then when the waves come back, they interfere with each other. And you look at differences in that interference to tell you the difference in how long it took for one beam to go one way, and the other beam to go the other way. The way I said it was really careful there because there's a lot of confusion about the idea of, these are waves and space is bending, and everything is shrinking, and how come the light's not shrinking, and so on. We don't really know. There's no real difference between the ideas of space and time warping. It could be space warping or time warping but THE ONLY THING THAT WE REALLY KNOW IS WHAT WE MEASURE. AND THAT'S THE MANTRA OF THE TRUE EMPIRICAL PERSON. We sent out the light and the light comes back and interferes, and the pattern changes. And that tells us something about effectively the delay that the light's on. And it could be that the space-time curved so that the light took longer to get there. But you could also imagine that there was a change in the time in one path as opposed to the other instead of the space but it's a mixture of space and time. So it sort of depends on your viewpoint."
https://blog.ycombinator.com/the-tec...ikari-of-ligo/

Pentcho Valev
 




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