Image Gallery

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I. Simulating the large-scale baryonic Universe

Left panels: large-scale views of the simulated Horizon-AGN Universe with ~100 Mpc size on top left and ~10 Mpc size on bottom left... > more

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II. Simulating the large-scale baryonic Universe

The background image depicts the large-scale cosmic web from Horizon-AGN with a soft transition between gas density... > more

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III. Simulating the large-scale baryonic Universe

Bottom panel shows the gas density (blue) and temperature (red) in the large-scale Horizon-AGN simulation... > more

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Stability of a Primordial Gas Cloud

The first stars in the Universe formed out of primordial gas, which only consists of hydrogen and helium. We use hydrodynamical simulations to follow the collapse

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The Paris Local Universe Simulations: Dark Matter Sky Maps

This picture shows the result of a high resolution N-body simulation which has been specifically designed to look like the Local Universe.

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Dancing in the Dark

The properties of the galaxies are shaped by the dynamics of the dark matter at large scale. On this picture coming from a cosmological simulation, each dot is a galaxy.

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The Cosmic Microwave Background

The picture shows a map of the cosmic microwave background (CMB), that is the first visible light after the Big Bang, as recovered from the Planck satellite maps.

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"This is the type of image we astronomers discard"

I came across this image whilst doing some work and it made me halt my work for a bit as I was taken by it’s beauty. What is seen is an extremely tiny part of the sky, ...

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Sedov Taylor Blast Wave

In order to make sure that the used program is following the correct physics we often have to go back and simulate simple toy-models to which we already understand the solution.

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A simulation of the Universe -- Horizon-AGN

Our Universe is far from being random. Billions of stars are organised into galaxies. Galaxies cluster together and align themselves along cosmic filaments.