Testing Modifications of Gravity
Abstract
Dwarf galaxies test the proposal that the appearance of dark matter is due to a change in the law of gravity at low acceleations (<~ 10^-1^ cm s^-2^). The observed acceleration in bright galaxies eceeeds 25% of this value. We model six dwarf galaxies with low accelerations and show that Milgrom's non-Newtonian theory fails. Since these systems have large ratios of H I mass to luminosity (M_HI_/L), the non-Newtonian theory cannot be fitted by arbitarily lowering the mass-to-light ratio of the stellar component.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1989
- DOI:
- 10.1086/185541
- Bibcode:
- 1989ApJ...345L..17L
- Keywords:
-
- Dwarf Galaxies;
- Galactic Structure;
- Gravitational Effects;
- Dark Matter;
- Galactic Rotation;
- Mass To Light Ratios;
- Astrophysics;
- GALAXIES: INTERNAL MOTIONS;
- GALAXIES: STRUCTURE