Andromeda Dwarfs in Light of Mond. II. Testing Prior Predictions

Authors

Stacy S. McGaugh, Case Western Reserve UniversityFollow

Author ORCID Identifier

Stacy S. McGaugh

Document Type

Article

Publication Date

9-16-2013

Abstract

We employ recently published measurements of the velocity dispersions in the newly discovered dwarf satellite galaxies of Andromeda to test our previously published predictions of this quantity. The data are in good agreement with our specific predictions for each dwarf made a priori with modified Newtonian dynamics (MOND), with reasonable stellar mass-to-light ratios, and no dark matter, while Newtonian dynamics point to quite large mass discrepancies in these systems. MOND distinguishes between regimes where the internal field of the dwarf, or the external field of the host, dominates. The data appear to recognize this distinction, which is a unique feature of MOND not explicable in ΛCDM. © 2013. The American Astronomical Society. All rights reserved.

Keywords

dark matter, galaxies: kinematics and dynamics, local group

Language

English

Publication Title

Astrophysical Journal

Grant

NNX11AF89G

Rights

© The American Astronomical Society. All rights reserved. This content is free to access, download, and share. For all other uses, you must obtain permission to reuse content: https://journals.aas.org/article-charges-and-copyright/#AAS_material

Recommended Citation

Stacy McGaugh and Mordehai Milgrom 2013. Andromeda Dwarfs in Light of Mond. II. Testing Prior Predictions. ApJ 775 139