Plot: Strong [CII] emission at high redsift

With the detection of the [CII] transition this increases the potential to use this transition to search and characterise high-z sources.

A Comparison of Galaxy Merger History Observations and Predictions from Semi-Analytic Models

 This paper (http://xxx.lanl.gov/abs/0904.2365) presents some interesting results from comparing predicted merger rates and fractions from the Millennium Simulation to observations of galaxy mergers out to z~3.   

Plot: Cluster Strong Lensing in Millennium Simulation

The Problem: How do secondary matter structures and stellar mass in galaxies along the line-of-sight affect strong cluster lensing?
What they do: Use ray-tracing through the Millennium simulation to probe this contribution.
Answer: There can be considerable increases to strong-lensing optical depth and cross-sections.