This is the astro-ph blog of the Theoretical Modelling of Cosmic Structures group (TMoX) at the Max-Planck-Institute for Extraterrestrial Physics. We are an independent Max-Planck Research Group focusing on the various aspects in the formation and evolution of galaxies. Part of our focus is on the formation and evolution of early-type galaxies, super-massive black holes, the formation of the first structures in the universe and the enrichment history of the Universe. We are theoreticians using analytic modelling as well as numerical simulations in our work.

The CosmologyCake blog is dedicated to the discussion of research papers and current developments. We will regularly post interesting papers and comment on them. Feel free to leave your comments as well. We encourage authors of discussed papers to post replies if they wish to. Our aim is to provide a platform to discuss recent astro-ph papers within a wider audience. Please feel free to send papers you would like to be discussed to us at

7 June 2012

Star Formation in Galaxy Mergers with Realistic Models of Stellar Feedback & the Interstellar Medium

Authors: Hopkins et al. 2012
Paper: here

The authors discuss the results of high-resolution hydrodynamic simulations of galaxy mergers. They employ a sophisticated implementation of stellar feedback coupled to a `realistic' modelling of the multiphase ISM. They show that most of the stellar mass that ends up in the bulge is produced in situ, contrary to other recent simulations. The reason is the efficient disruption of GMC by stellar feedback which supplies more gas to the bulge than in other models. They compare their simulations to models assuming an effective equation of state.

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