Poster Physics
STEM, Research

Tracing the Cosmic Web. A percolation analysis of Large-Scale structure

Have you ever wondered how galaxies distribute themselves in the Universe on large scales? Surprisingly, they follow some filament-like patterns. I spent my summer trying to characterise this behaviour from the statistical point of view in a research dealing with cosmology and computational physics.
Go to the profile of Tommaso Marzan
Tommaso Marzan
Student, EPFL
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On large scales, the distribution of matter in the Universe exhibits a non-uniform organization, resulting in the formation of galaxy aggregations across various scales. These galaxies tend to align into a cosmic network of filaments and dense nodes. 

My research tries to characterise this behaviour from the statistical point of view for a limited sample of Luminous Red Galaxies observed by DESI telescope (Dark Energy Spectroscopic Instrument). 

Using percolation theory in 3D and a control sample uniformly-distributed over the same portion of sky, I was able to demonstrate the spatial clustering of the real Universe. Several diagnostics borrowed from phase-transition theory and statistical physics have been used to quantify the tendency of galaxies to exhibit a filament-like structure.

Galaxy filaments issued by a computer simulation.
Credits: A. Pontzen & F. Governato / Wikimedia Commons / CC BY 2.0.
Go to the profile of Tommaso Marzan
Tommaso Marzan
Student, EPFL

Hi there! I’m Tommaso (with two Ms!) and I’m a 3rd year bachelor student in Physics at EPFL.

Beyond Physics, I have a deep passion about journalism and current events, along with history of arts and its way of crafting societies. I enjoy spending time in nature, especially when it comes to mountain sports like rock climbing or skiing. I've also practiced track and field for many years, and I currently enjoy going for a run along the lake!

Happy to chat anytime about any topic!

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