Substructure in dark matter halos: Towards a model of the abundance and spatial distribution of subclumps

Details Substructure in dark matter halos: Towards a model of the abundance and spatial distribution of subclumps Substructure in dark matter halos: Towards a model of the abundance and spatial distribution of subclumps

2003-04-21

arxiv.org/abs/astro-ph/0304355v1

Mon.Not.Roy.Astron.Soc. 345 (2003) 1200

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, submitted to MNRAS

Scientific paper

10.1046/j.1365-2966.2003.07034.x

I develop a model for the abundance and spatial distribution of dark matter subclumps. The model shows that subclumps of massive parent halos formed at earlier times than subclumps of the same mass in lower mass parents; equivalently, halos in dense regions at a given time formed earlier than halos of the same mass in less dense regions. This may provide the basis for interpreting recent observations which indicate that the stellar populations of the most massive elliptical galaxies are also the oldest.

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