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{\Lambda} CDM is Consistent with SPARC Radial Acceleration Relation

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arxiv 1610.06183 v3 pith:2MPI4CW6 submitted 2016-10-19 astro-ph.GA

B.W. Keller , J.W. Wadsley This is my paper · ORCID
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keywords accelerationrelationsparclambdaevidencematchphysicsradial
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abstract

Recent analysis \citep{McGaugh2016} of the SPARC galaxy sample found a surprisingly tight relation between the radial acceleration inferred from the rotation curves, and the acceleration due to the baryonic components of the disc. It has been suggested that this relation may be evidence for new physics, beyond $\Lambda CDM$. In this letter we show that 32 galaxies from the MUGS2 match the SPARC acceleration relation. These cosmological simulations of star forming, rotationally supported discs were simulated with a {\sc WMAP3} $\Lambda CDM$ cosmology, and match the SPARC acceleration relation with less scatter than the observational data. These results show that this acceleration relation is a consequence of dissipative collapse of baryons, rather than being evidence for exotic dark-sector physics or new dynamical laws.

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  1. Parameter-free prediction of the asymptotic acceleration scale confirmed by weak lensing

    astro-ph.GA 2026-08 reject novelty 4.0 of 10

    A predicted formula for the MOND acceleration scale, using the Hubble parameter and deceleration parameter, matches a weak-lensing measurement of the baryonic Tully-Fisher relation.

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