The Search for Dark Matter, part I - Prof. Alan Duffy

It's a bit weird how astronomers still have yet to properly identify about 85% of the matter in the universe. The matter we can see, the atoms and particles and photons, is just 15% or so - the rest is Dark Matter, ghostly stuff that researchers like Alan Duffy know is there, they can see its effect on galaxies, and clusters of galaxies, and the cosmic microwave background ... they just don't know what it is yet. So Alan is leading one of the big experiments to try to nail down this elusive stuff once and for all.
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Prof. Alan Duffy from Swinburne University, speaking to students at the 43rd Professor Harry Messel International Science School, ISS2023: solve for x - The University of Sydney, Australia, July 2023.
Alan's second dark matter lecture: • The Search for Dark Ma...
Check out the ISS2023 Playlist: • ISS2023: solve for x
For more about the ISS: sydney.edu.au/s...

[@jenniferqi3074]

As well known in the field, Vera Rubin discovered the flat rotation curves of spiral galaxies using optical spectra, which could be a Noble prize worth discovery. However, very few people noticed that when Vera Rubin interpreted her observational results, she made a very simple mistake: She applied the spherical model to the spiral galaxies (see the paper published in Science by Vera Rubin: Science, New Series, Vol. 220, No. 4604 (Jun. 24, 1983), pp. 1339-1344). Also, when you read the paper published by Fritz Zwicky in 1937 (THE ASTROPHYSICAL JOURNAL, Vol. 86, No. 3, 217-246) carefully, you will notice that he also utilized a spherical model to estimate the mass of the Coma cluster.
As every physicist should know, an object with a spherical mass produces a Keplerian rotational curve, but a disk-like mass distribution will not follow that. Therefore, the key issue is how the mass is distributed in a galaxy. Any galaxy with a spherical (or close to spherical) mass distribution will not need dark matter. The results of NGC1052-DF2 and DF4 are the examples. The flat rotation curves of spiral galaxies are caused by the disk shaped (non spherical) mass distributions.
With the latest GAIA data, it has been shown that by using a disk mass distribution model and by solving the Poisson equation of the Galaxy, a flat rotation curve which reproduces the key observed features with no need for a dark halo has been obtained (see arxiv paper 1612.07781.pdf).
By the way, MOND is just another way to reflect the effects caused by the non-spherical mass distributions. If MOND is correct, how can Newtonian mechanics work for DF2 and DF4 without modifications?
So, dark matter does not exist and it is just a consequence of misusing Newton’s law in gravitational systems with non-spherical mass distributions (see DOI:10.1142/S2424942417500049). Newtonian mechanics does not need to modify when the non-spherical mass distributions are considered.

[@eternisedDragon7]

If Prof. Alan Duffy actually cared to know about what neutrinos, err dark matter (and the relativistic kinetic energy of the fraction that is the hot neutrinos that constitutes the dark kinetic energy) are, then he would have checked out my e-mail from months ago by now, or searched for the phrase "Resolution of the Dark Matter Mystery", which he apparently didn't. But Dr. Stephen Wolfram did and finds my theory sensible.