The collision velocity of the bullet cluster in conventional and modified dynamics
Astrophysics
2009-11-13 v2
Abstract
We consider the orbit of the bullet cluster 1E 0657-56 in both CDM and MOND using accurate mass models appropriate to each case in order to ascertain the maximum plausible collision velocity. Impact velocities consistent with the shock velocity (~ 4700km/s) occur naturally in MOND. CDM can generate collision velocities of at most ~ 3800km/s, and is only consistent with the data provided that the shock velocity has been substantially enhanced by hydrodynamical effects.
Keywords
Cite
@article{arxiv.0704.0381,
title = {The collision velocity of the bullet cluster in conventional and modified dynamics},
author = {Garry W. Angus and Stacy S. McGaugh},
journal= {arXiv preprint arXiv:0704.0381},
year = {2009}
}
Comments
8 pages, 4 figures, 1 table, accepted for publication in MNRAS