Bound and unbound substructures in Galaxy-scale Dark Matter haloes

Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Submitted to MNRAS on 12/10/2010, 11 pages, 10 figures

Scientific paper

We analyse the coarse-grained phase-space structure of the six Galaxy-scale dark matter haloes of the Aquarius Project using a state-of-the-art 6D substructure finder. Within r_50, we find that about 35% of the mass is in identifiable substructures, predominantly tidal streams, but including about 14% in self-bound subhaloes. The slope of the differential substructure mass function is close to -2, which should be compared to around -1.9 for the population of self-bound subhaloes. Near r_50 about 60% of the mass is in substructures, with about 30% in self-bound subhaloes. The inner 35 kpc of the highest resolution simulation has only 0.5% of its mass in self-bound subhaloes, but 3.3% in detected substructure, again primarily tidal streams. The densest tidal streams near the solar position have a 3-D mass density about 1% of the local mean, and populate the high velocity tail of the velocity distribution.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Bound and unbound substructures in Galaxy-scale Dark Matter haloes 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 Bound and unbound substructures in Galaxy-scale Dark Matter haloes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bound and unbound substructures in Galaxy-scale Dark Matter haloes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-225785

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.