Uncovering CDM halo substructure with tidal streams

Details Uncovering CDM halo substructure with tidal streams Uncovering CDM halo substructure with tidal streams

2001-10-31

arxiv.org/abs/astro-ph/0110690v1

Mon.Not.Roy.Astron.Soc. 332 (2002) 915

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures, submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.2002.05358.x

Models for the formation and growth of structure in a cold dark matter dominated universe predict that galaxy halos should contain significant substructure. Studies of the Milky Way, however, have yet to identify the expected few hundred sub-halos with masses greater than about 10^6 Msun. Here we propose a test for the presence of sub-halos in the halos of galaxies. We show that the structure of the tidal tails of ancient globular clusters is very sensitive to heating by repeated close encounters with the massive dark sub-halos. We discuss the detection of such an effect in the context of the next generation of astrometric missions, and conclude that it should be easily detectable with the GAIA dataset. The finding of a single extended cold stellar stream from a globular cluster would support alternative theories, such as self-interacting dark matter, that give rise to smoother halos.

Affiliated with

Also associated with

No associations

Rating

Uncovering CDM halo substructure with tidal streams 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 Uncovering CDM halo substructure with tidal streams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Uncovering CDM halo substructure with tidal streams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-104221