Dark Matter Alternative Passes Big Test
18 Oct 2021 20:35:37 UTC
Topic 226242
(moderation:
Researchers pursuing an unconventional view of cosmology that dispenses with dark matter have developed a model that can match observations of the cosmic microwave background (CMB), the leftover glow of the big bang [1]. This dark-matter-free model is an extension of the so-called MOND (modified Newtonian dynamics) theory, which assumes that the gravitational force on galaxy scales is different from the standard Newtonian force. Previous MOND-based models could not reproduce the CMB. The researchers say that their model can be further tested with observations of galaxy clusters and gravitational waves.
Dark Matter Alternative Passes Big Test
I wonder if the type of gravity waves that Einstein hopes to find will be of use with this?
I don't think our research
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I don't think our research here will be of help on this issue. The threshold of 10-10 m/s2 is way too low for us to be probing. That's a tiny acceleration. It's only on large scales that such a subtle effect would become apparent. We deal with compact bodies and high field strengths.
It's hard to imagine in a simple sense what a combination of a scalar field and and a vector field looks like. I've no useful intuition on this. If the scalar field is truly like the Higgs field then it ought have a quantum ie. a particle associated with it.
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
Thanks. That is the type of
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Thanks. That is the type of orders-of-magnitude insight that we need.
At least I can fire up my RX570 again this fall to look for them.