Contact

Pillepich, Annalisa
Annalisa Pillepich
Independent Research Group Leader

Phone: +49 6221 528-395
Room: C 4

Cosmological Simulations

A galaxy simulated within a large cosmological simulation seen in H-alpha light, tracing star formation. Zoom Image

A galaxy simulated within a large cosmological simulation seen in H-alpha light, tracing star formation.

In the last few years, a standard model of cosmology has emerged, called the LCDM model.

Ordinary luminous matter (baryons) makes up only a small fraction (about 4 percent) of the total mass density. The remaining part of the universe is dark and made up of two different ingredients: Dark Matter and Dark Energy. The theory of cold dark matter (CDM) provides now a successful framework for understanding structure formation in the universe.

The back bone of dark matter (main panel) and the distribution of stellar mass (upper right inset) on large cosmological scales encompassing hundreds Mpc a side. Insets show examples of individual galaxies simulated within such large cosmological volumes, in stellar mass or stellar light projections. Zoom Image

The back bone of dark matter (main panel) and the distribution of stellar mass (upper right inset) on large cosmological scales encompassing hundreds Mpc a side. Insets show examples of individual galaxies simulated within such large cosmological volumes, in stellar mass or stellar light projections.

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In a universe dominated by cold dark matter and a cosmological constant, galaxy formation and evolution is a complex combination of the hierarchical growth of structures, cooling of gas towards the center of dark matter haloes, stellar formation and stellar evolution, production of heavy elements, exchanges of energy and momentum between stars and super massive black holes on the one side and gas on the other, galaxy mergers and interactions, secular evolution, etc.

The aim of our research is to understand how galaxies form and evolve during cosmic epochs and to disentangle the different physical processes that contribute to shape their properties. In particular, we aim at modeling galaxies from the smallest to the most massive ones, in all expected cosmological environments. To do so, we solve the equations of gravity and magnetohydrodynamics in an expanding universe by simultaneously resolving and modeling the structural inner details of tens of thousands of galaxies together with the large-scale cosmic web.

Associated Research Groups

The aim of this group's research is to understand the formation and evolution of galaxies through cosmic time in a Universe dominated by Dark Matter and Dark Energy.

Galaxies and Cosmology Theory Group

The aim of this group's research is to understand the formation and evolution of galaxies through cosmic time in a Universe dominated by Dark Matter and Dark Energy. [more]
 
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