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

Understand

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.