Andromeda Dwarfs in Light of MOND

TL;DR

This paper evaluates the consistency of observed velocity dispersions in Andromeda dwarf spheroidals with MOND predictions, finding agreement and providing future predictions based on photometric data.

Contribution

It compares observed data with MOND predictions for multiple dwarfs and extends predictions to additional dwarfs lacking velocity data.

Findings

Observed dispersions are consistent with MOND within uncertainties.

MOND predictions align with measured data for 17 dwarfs.

Predicted dispersions for 10 additional dwarfs based on photometry.

Abstract

We compare the recently published velocity dispersions for seventeen Andromeda dwarf spheroidals with estimates of the MOND predictions, based on the luminosities of these dwarfs, with reasonable stellar M/L values, and no dark matter. We find that the two are consistent within the uncertainties. We further predict the velocity dispersions of another ten dwarfs for which only photometric data are currently available.