Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-06
Astronomy and Astrophysics
Astrophysics
IDM 2000, "Third international workshop on the identification of dark matter", ed. N. Spooner (World Scientific)
Scientific paper
The hierarchical cold dark matter (CDM) model for structure formation is a well defined and testable model. Direct detection is the best technique for confirming the model yet predictions for the energy and density distribution of particles on earth remain inadequate. Axially symmetric collapse of collisionless dark matter can leave observable caustic rings in phase space and this model is frequently used to make experimental predictions (Sikivie 1999). Such cold collapses inevitably suffer from radial orbit instabilities that produce unrealistic bar-like halos. Moreover, this model bears no relation to the hierarchical growth of CDM galactic halos which form via a complicated sequence of mergers and violent relaxation. This process destroys any symmetry and phase wraps existing caustics on a scale comparable to the first objects to collapse. Since axions can cluster on microscopic scales and free streaming of neutralinos only erases structure smaller than \sim 100 (GeV/m_{CDM}) A.U., the dynamical effects of caustics in the Galactic halo are expected to be negligible.
No associations
LandOfFree
Caustic Rings and Cold Dark Matter 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 Caustic Rings and Cold Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Caustic Rings and Cold Dark Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-431831