One thing that bugs me about dark matter is that all the assumptions being made do not seem to have been fully investigated before "accepting" the idea as mainstream:
"The Duhem–Quine thesis, also called the Duhem–Quine problem, after Pierre Duhem and Willard Van Orman Quine, is that it is impossible to test a scientific hypothesis in isolation, because an empirical test of the hypothesis requires one or more background assumptions (also called auxiliary assumptions or auxiliary hypotheses). In recent decades the set of associated assumptions supporting a thesis sometimes is called a bundle of hypotheses."
https://en.wikipedia.org/wiki/Duhem%E2%80%93Quine_thesis
For example, when predicting the rotation curves you can instead assume the mass is log-normally distributed and get the flat curves:
"The generation of the 37 galaxy velocity profiles presented in this paper assumed that most of the galactic mass is in the disk, and gravity is Newtonian. A best-fit algorithm was used to generate the curves of Figures 1 and 3 – 38 using a truncated log-normal surface density distribution function. The log-normal models closely matched the shape of observational rotation velocities, and the predicted masses for these curves fitted a baryonic Tully-Fisher relation reasonably well over a wide range of galaxy sizes, from LSB galaxies to massive high-luminosity disks."
https://arxiv.org/abs/1502.02949
It isn't that I think that must be the correct solution, but why was no one publishing the results of investigating that assumption until 2015?
Its explained on the next page(it a simplification)
In fact, by relaxing some of the assumptions made above,
we have the more general relationship: L ∝ V
2/(+s+q−t)
opt
(here s, q and t can be band-
dependent) that can be even more complex and non-linear when the scaling laws (2), (3),
(4) are not just power laws. As a matter of fact, in several different large samples of galaxies
it has been found that the TF has different slope and scatter in different bands: a I ≃ 10,
s I ∼ 0.4mag, while a B ≃ 7.7, s B ∼ 0.5mag (Pierce & Tully 1992), (Salucci et al. 1993).
Moreover, a non linearity in the TF is often found at low rotation velocities (Aaronson et
al. 1982).
"The Duhem–Quine thesis, also called the Duhem–Quine problem, after Pierre Duhem and Willard Van Orman Quine, is that it is impossible to test a scientific hypothesis in isolation, because an empirical test of the hypothesis requires one or more background assumptions (also called auxiliary assumptions or auxiliary hypotheses). In recent decades the set of associated assumptions supporting a thesis sometimes is called a bundle of hypotheses." https://en.wikipedia.org/wiki/Duhem%E2%80%93Quine_thesis
For example, when predicting the rotation curves you can instead assume the mass is log-normally distributed and get the flat curves:
"The generation of the 37 galaxy velocity profiles presented in this paper assumed that most of the galactic mass is in the disk, and gravity is Newtonian. A best-fit algorithm was used to generate the curves of Figures 1 and 3 – 38 using a truncated log-normal surface density distribution function. The log-normal models closely matched the shape of observational rotation velocities, and the predicted masses for these curves fitted a baryonic Tully-Fisher relation reasonably well over a wide range of galaxy sizes, from LSB galaxies to massive high-luminosity disks." https://arxiv.org/abs/1502.02949
It isn't that I think that must be the correct solution, but why was no one publishing the results of investigating that assumption until 2015?