Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-24
Astropart.Phys.16:47-66,2001
Astronomy and Astrophysics
Astrophysics
Astroparticle Physics (accepted)--30 pages, 13 figures--please, contact GMT for higher quality figures
Scientific paper
10.1016/S0927-6505(00)00171-7
The isotropy in the ultra high energy cosmic ray (UHECR) flux observed by Yakutsk and AGASA experiments, is a very strong constraint to production and propagation models alike. Most of the scenarios proposed in the literature should produce a sizable anisotropy as either extragalactic luminous or dark matter is normally associated with the invoked particle sources. We explore the possibility that the magnetic fields in fossil cocoons of former radio galaxies -- so called {\it radio ghosts} -- are able to scatter UHECR in the intergalactic medium giving rise to the observed isotropy. We show, through numerical simulations, under which conditions this process can be operative and the magnitude of the effect. We further demonstrate, that if radio ghosts mix with the ambient medium, they might be able to produce the observed magnetic fields in clusters of galaxies. In the case of mixing, the UHECR isotropization would be even stronger than in our conservative estimates.
Ensslin Torsten A.
Medina-Tanco Gustavo
No associations
LandOfFree
Isotropization of Ultra-High Energy Cosmic Ray Arrival Directions by Radio Ghosts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Isotropization of Ultra-High Energy Cosmic Ray Arrival Directions by Radio Ghosts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isotropization of Ultra-High Energy Cosmic Ray Arrival Directions by Radio Ghosts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-646493