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Guru

Join Date: Feb 2012
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Possible Dark Matter Alternative

02/09/2021 3:04 PM
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Guru
Popular Science - Cosmology - Let's keep knowledge expanding Engineering Fields - Retired Engineers / Mentors -

Join Date: Dec 2006
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#1

Re: Possible Dark Matter Alternative

02/10/2021 12:40 PM

I looks rather conclusive to me. Here is part of their conclusions:

"...We use accurate rotation curves and mass models from the SPARC database (Lelli et al. 2016) and detect the EFE in three separate ways:

  • 1. The EFE is individually detected in "golden" galaxies subjected to exceptionally strong external gravitational fields. The detection is highly significant (11σ in NGC 5055 and 8σ in NGC 5033) and the best-fit values of the external gravitational fields are fully consistent with the independent estimates from the large-scale distribution of mass at the galaxies' location. Conversely, the EFE is not detected in control galaxies residing in the weakest external gravitational fields, as expected.
  • 2. The EFE is statistically detected at more than 4σ through a blind test using 153 SPARC galaxies. The mean value of the external gravitational field among the SPARC galaxies is again consistent with the independent estimate from the average distribution of mass in the nearby universe.
  • 3. The EFE also manifests as a small (0.05 dex), downward deviation from the empirical RAR occurring around 0.1g†. This behavior is not predicted by any of the existing galaxy formation models in ΛCDM that were proposed to "naturally" reproduce the RAR. In contrast, this downward deviation is predicted by the MOND modified gravity at the right acceleration scale."
  • So it seems to me that Einstein's theory of gravity isn't completely right and the ΛCDM is not either. I have never liked the Dark Matter hypothesis.
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Guru
Engineering Fields - Engineering Physics - New Member

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#2

Re: Possible Dark Matter Alternative

02/10/2021 10:39 PM

I will support MOND until the voices in my head say different.

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Power-User

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#3

Re: Possible Dark Matter Alternative

02/13/2021 6:29 PM

Dark matter is needed to explain star orbital velocities. But the fact of the matter is that those star orbits are helical, not elliptical. Just like the orbits in our solar system and galaxy. These are non-pi rotations. Which one of your gravity equations predict helical orbits? OOPS.

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