Self-similar galaxy dynamics below the de Sitter scale of acceleration

Abstract

Radial accelerations $\alpha$ in galaxy dynamics are now observed over an extended range in redshift that includes model calculations on galactic distributions of cold dark matter (CDM) in $\Lambda$CDM. In a compilation of data of the {\em Spitzer} Photometry and Accurate Rotation Curves (SPARC) catalogue, the recent sample of Genzel et al.(2017) and the McMaster Unbiased Galaxy Simulations 2, we report on effective self-similarity in the variable $\zeta =a_N/a_{dS}$, given by the Newtonian acceleration $a_N$ based on baryonic matter content over the de Sitter scale of acceleration $a_{dS}=cH$, where $c$ is the velocity of light and $H$ is the Hubble parameter. SPARC, MUG2 and theory satisfy $a_N/\alpha \simeq 2.1{\zeta }^{\frac{1}{2}}$ $(\zeta <<1)$. At $\zeta =1$ in transition to Newtonian gravity ($\zeta >>1$), however, there is a $6\sigma$ gap between SPARC and MUGS2. This poses a novel challenge to CDM in $\Lambda$CDM against the apparent $C^0$ galaxy dynamics observed in SPARC. We attribute the latter to reduced inertia below the de Sitter scale of acceleration $(\zeta <1)$, based on a causality constraint imposed by the cosmological horizon $\mathcal{H}$.

published version (4 pages, 3 figures) of APS April 2018 talk, Session K13

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Cited by in corpus (5)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Radial Acceleration Relation between Baryons and Dark or Phantom Matter in the Super-critical Acceleration Regime of Nearly Spherical Galaxies
• On the Hubble expansion in a Big Bang quantum cosmology
• Parameter-free prediction of the asymptotic acceleration scale confirmed by weak lensing
• Galaxy dynamics tracing quantum cosmology beyond $\Lambda$CDM below the de Sitter scale of acceleration