Evidence for Milgromian gravity from galactic bars to the Hubble tension
Channel: Indranil Banik
Date: 2021-10-01

Slides are available here:
https://www.dropbox.com/s/y3tv3x02azi3vxl/Southhampton.pdf?dl=0

A detailed review of MOND is available here, where you can read about the lines of evidence presented in the video and many others besides:
https://arxiv.org/abs/2110.06936

I review evidence for Milgromian dynamics (MOND) across a huge range of scales. The main lines of evidence I discuss are the rotation curves of galaxies, the dynamics of ellipticals, the Local Group satellite galaxy planes, galaxy bar pattern speeds, El Gordo, the KBC void and the related Hubble tension. I also provide a viable cosmological framework for MOND involving light sterile neutrinos with a mass of 11 eV/c^2 and the same total density as the cold dark matter in the LCDM standard cosmological paradigm. I use this to explain observations previously considered problematic for MOND like the cosmic microwave background radiation and the Bullet Cluster, and galaxy clusters more generally. There is also a long question and answer section in which I address several fairly common objections to the proposed nuHDM framework, which I consider to be a marriage between the best aspects of LCDM and MOND. The focus is on astrophysical situations not used in theory construction, hence the relatively small amount of time on how rotation curve data agrees with MOND. Some of the more important references are given below.

McGaugh, Lelli & Schombert 2016 (https://arxiv.org/abs/1609.05917): radial acceleration relation (RAR) of disc galaxies
Lelli+ 2017 (https://arxiv.org/abs/1610.08981): radial acceleration relation of elliptical galaxies
Brouwer+ 2021 (https://arxiv.org/abs/2106.11677): galaxy-galaxy weak lensing radial acceleration relation
Pawlowski+ 2014 (https://arxiv.org/abs/1406.1799): why the Local Group satellite planes cannot be reconciled with LCDM
Pawlowski & Kroupa 2020 (https://arxiv.org/abs/1911.05081): update to the above for the Milky Way using Gaia DR2
Skordis & Zlosnik 2019 (https://arxiv.org/abs/1905.09465): gravitational waves can travel at c in MOND
Haslbauer, Banik & Kroupa 2020 (https://arxiv.org/abs/2009.11292): KBC void and Hubble tension in LCDM and MOND, including detailed discussion of how cosmology works in MOND
Angus+ 2007 (https://arxiv.org/abs/astro-ph/0609125): MOND can fit the Bullet Cluster using 2 eV/c^2 mass sterile neutrinos
Angus, Famaey & Diaferio 2009 (https://arxiv.org/abs/0906.3322): MOND can fit virialized galaxy clusters using sterile neutrinos with a mass of 11 eV/c^2
Angus 2011 (https://arxiv.org/abs/1104.5040): MOND can fit the CMB using sterile neutrinos with a mass of 11 eV/c^2
Asencio, Banik & Kroupa 2021 (https://arxiv.org/abs/2012.03950): why the interacting galaxy cluster El Gordo falsifies LCDM
Roshan+ 2021a (https://arxiv.org/abs/2103.01794): simulations of a barred disc galaxy in different gravity theories including LCDM with halo parameters chosen to fit the RAR
Roshan+ 2021b (https://arxiv.org/abs/2106.10304): comparison between observed bar parameter distribution and that in latest LCDM cosmological hydrodynamical simulations
Banik & Zhao 2018 (https://arxiv.org/abs/1906.08264): accurate MOND prediction for wide binaries, derivation of threshold below which quantum gravity effects might become important
Banik, Pittordis & Sutherland 2021 (https://arxiv.org/abs/2109.03827): detailed plan for the wide binary test

TritonStation blog: https://tritonstation.com/
DarkMatterCrisis blog: https://darkmattercrisis.wordpress.com/

Enjoy my video! If you have any questions, feel free to email me at:
indranilbanik1992@gmail.com