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

Abstract

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.

5 pages, 2 figures, submitted to MNRAS

References in corpus (2)

• Halo Models of Large Scale Structure
• Galaxy Star-Formation as a Function of Environment in the Early Data Release of the Sloan Digital Sky Survey

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