Title: Fractality of the Large Scale Structures

Stage numéro : M1-1920-RE-01
Laboratoire :Centre de Physique des Particules de Marseille Case 902
 163 avenue de Luminy - 13288 Marseille Cedex 9
Directeur :Cristinel Diaconu - 04.91.82.72.01 - diaconu@cppm.in2p3.fr
Correspondant :William Gillard - 04.91.82.72.67 - gillard@cppm.in2p3.fr
Groupe d'accueil :Renoir
Chef de groupe :Dominique Fouchez - 04.91.82.72.49 - fouchez@cppm.in2p3.fr
Responsable de stage :Ntelis Pierros - 0033 7 82 34 34 39, 0033 4 91 82 76 88 - pntelis@cppm.in2p3.fr

Thématique : Cosmologie observationnelle

In the era of Stage IV, experiments the sky will be more revealing than ever. The main pillars of modern cosmology is the Cosmological Principle and the theory General of Relativity, our best description of gravity, to date. The best phenomenological model is named LCDM where L stands for the unknown Dark Energy component of the Universe responsible for the primordial and late time acceleration of the Universe, while LCDM stands for Cold Dark Matter, which is another unknown component that fills, up to 80% of the total matter of the universe to date, 2019. In order to test this theory, we will develop a new approach to study the large scale structures through the Fractal Dimension. This Fractal Dimension describes the self-similar behaviour of galaxy samples.

This projects has two aims. The first aim is to deepen the understanding of the student on cosmological models. The second aim is to give the student the necessary skills in observational cosmology and the large scale structure science.

References:

Cosmological implications of baryon acoustic oscillation (BAO) measurements https://arxiv.org/abs/1411.1074

A 14h?3Gpc3 study of cosmic homogeneity using BOSS DR12 quasar sample https://arxiv.org/abs/1602.09010

SLOAN DIGITAL SKY SURVEY IV: MAPPING THE MILKY WAY, NEARBY GALAXIES, AND THE DISTANT UNIVERSE, https://arxiv.org/abs/1703.00052

Exploring Cosmic homogeneity with DR12 BOSS galaxy sample https://arxiv.org/abs/1702.02159

The scale of homogeneity as a standard Ruler https://arxiv.org/abs/1810.09362

Cosmological constraints from cosmic homogeneity https://arxiv.org/abs/1904.06135