The `dark galaxy' VIRGOHI21 seems to be composed of an unusually high proportion of dark matter and is situated in a strong external gravitational field. As such, it offers a rare test for theories of modified dynamics. If the system is bound, then its dynamics are inconsistent with those predicted by the MOND theory.
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 2005
- galaxies: kinematics and dynamics;
- dark matter;
- 2 pages. Content identical to published version