Get fancy images, movies, and codes
Numerical astrophysics aims to model and understand the physical processes that are responsible for astrophysical phenomena. As a convienient by-product, these numerical simulations can produce stunning visualisations. This page lists several images and movies that can be downloaded, as well as some astrophysical codes that I have written.
I have written several codes for astrophysics. You can download and use some of them freely. Please do not forget to include a reference in your work, should you find any of these codes useful.
Cosmic Variance Cookbook
This is a publicly available IDL code which computes cosmic variance (sample variance) for galaxies in given stellar mass bins as a function of mean redshift and redshift bin size. It is based on work in Moster et al. (2011).
The empirical galaxy formation model Emerge
Emerge, an Empirical ModEl for the foRmation of GalaxiEs, is a freely available code that populates simulated dark matter halo merger trees with galaxies using simple empirical relations between galaxy and halo properties. For each model represented by a set of parameters, it computes a mock universe, which it then compares to observed statistical data to obtain a likelihood. Parameter space can be explored with several advanced stochastic algorithms such as MCMC to find the models that are in agreement with the observations. For any model, Emerge can generate mock galaxy catalogues and main branch histories.