Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-04-12
IAU Symp.171:175,1996; Astrophys.J.447:l25,1995
Astronomy and Astrophysics
Astrophysics
uuencoded Z-compressed postscript file, 10 pages, 3 figures included, to appear in ApJ Letters
Scientific paper
10.1086/309560
Recent observations indicate that dark matter haloes have flat central density profiles. Cosmological simulations with non-baryonic dark matter predict however self similar haloes with central density cusps. This contradiction has lead to the conclusion that dark matter must be baryonic. Here it is shown that the dark matter haloes of dwarf spiral galaxies represent a one parameter family with self similar density profiles. The observed global halo parameters are coupled with each other through simple scaling relations which can be explained by the standard cold dark matter model if one assumes that all the haloes formed from density fluctuations with the same primordial amplitude. We find that the finite central halo densities correlate with the other global parameters. This result rules out scenarios where the flat halo cores formed subsequently through violent dynamical processes in the baryonic component. These cores instead provide important information on the origin and nature of dark matter in dwarf galaxies.
No associations
LandOfFree
The Structure of Dark Matter Haloes in Dwarf Galaxies 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 The Structure of Dark Matter Haloes in Dwarf Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Structure of Dark Matter Haloes in Dwarf Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-363474