Galaxy morphology in the LambdaCDM cosmology

Understand

We investigate the origins of galaxy morphology (defined by bulge-to-total K-band luminosity) in the LambdaCDM cosmology using two galaxy formation models ,based on the Millennium simulation, by Bower et al.

• (the Durham model) and De Lucia & Blaizot (the MPA model).
• There are many similarities, but also fundamental disagreements in the predictions of the two models for galaxy morphology.
• For example, taking into account uncertainties in the available observational data, both produce a realistic morphological mix today, but its evolution is very different.