Constrained Simulations of Dark Matter Halos

Details Constrained Simulations of Dark Matter Halos Constrained Simulations of Dark Matter Halos

2005-10-14

arxiv.org/abs/astro-ph/0510439v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure. To appear in the proceedings of the XXIst IAP Colloquium "Mass Profiles and Shapes of Cosmological Structur

Scientific paper

10.1051/eas:2006038

The formation and structure of dark matter halos is studied by constrained simulations. A series of experiments of the formation of a 10^12 Msun/h halo is designed to study the dependence of the density profile on its merging history. We find that the halo growth consist of several quiescent phases intermitted by violent events, with the density well approximated by the NFW profile during the former phases. We find that (1) the NFW scale radius R_s stays constant during the quiescent phase and grows abruptly during the violent one. In contrast, the virial radius grows linearly during the quiescent and abruptly during the violent phases. (2) The central density stays unchanged during the quiescent phase while dropping abruptly during the violent phase, and it does not reflect the formation time of the halo. (3) The clear separation of the evolution of an individual halo into quiescent and violent phases implies that its entire evolution cannot be fitted by simple scaling relations.

Affiliated with

Also associated with

No associations

Rating

Constrained Simulations of Dark Matter Halos 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 Constrained Simulations of Dark Matter Halos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constrained Simulations of Dark Matter Halos will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-222334