The collision velocity of the bullet cluster in conventional and modified dynamics

Apr, 2007
8 pages
Published in:
  • Mon.Not.Roy.Astron.Soc. 383 (2008) 417
e-Print:

Citations per year

20072011201520192023051015
Abstract: (arXiv)
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.