Seminar〝Minimal symmetry breaking of the cosmological principle and the Lemaitre-Hubble diagram〞

Star-UBB Seminar Series:- Minimal symmetry breaking of the cosmological principle and the Lemaitre-Hubble diagram

The speaker presents their definition of minimal symmetry breaking of the cosmological principle. For comoving dust, the definition leads uniquely to the axial Bianchi IX universes with positive curvature and their flat Bianchi I limits. They discuss the direction dependent Lemaitre-Hubble diagram of these universes and its future observational tests. In view of promised promising data from the Vera Rubin Observatory, the James Webb Space Telescope and the Chinese Space Station Telescope, they plead for an immediate preparation of a joint analysis with data from SuperNovae 1a, Cosmic Microwave Background, drift of radio sources and Baryonic Acoustic Oscillations.

時間:2023.01.26(四) 17:00~18:00
頻道:Zoom ID:853-7454-4159
講者:Thomas Schucker (Aix-Marseille University)


Scientific and Technological Advanced Research- Babeș-Bolyai University(Star-UBB) Seminar Series in Gravitation, Cosmology and Astrophysics

Presently a period of rapid and intense change are being witnessed in our understanding of the gravitational force, at a rate that is quickly increasing since the important observational discoveries of the late 1990s. With the advent of new observational techniques, the emergence of important cosmological and astrophysical paradigms can be seen that lead to a deep change in our understanding of the Universe. Astronomical observations strongly suggest that at large scales the force of gravity may not behave according to standard general relativity, and that a generalization of the gravitational action, either at the geometric level, or at the matter level, may be required for a full understanding of the gravitational interaction.

The goal of the present seminar is to bring Theoretical Gravitational Physics closer to the observations and experiments, and to discuss current topics in general relativity, high-energy physics, astrophysics and cosmology.