Elbereth conference 2025

Session

Session 5

10 avr. 2025, 10:00

Amphithéâtre Evry Schatzman (Observatoire de Paris - Site de Meudon)

74. High time-resolution analysis of X-ray data from Proxima Centauri

Andrea Damonte (UPC - CEA - UNIPA - INAF)

10/04/2025 10:00

Astrophysics

Oral presentation

The study of X-ray and extreme ultraviolet (together, XUV) emission from stars has experienced a renewed interest in recent years. The focus has shifted from the study of stellar physics towards the effects of these emissions on exoplanet atmospheres, and is now part of a bigger field concerned with star-planet interactions. Particular attention is given to M dwarfs, low-mass, cool stars that...

100. Oceanic tides : a hierarchy of models

Baptiste Loire (LTE - Observatoire de Paris)

10/04/2025 10:15

Astrophysics

Oral presentation

Oceanic tides play a fundamental role in the evolutionary dynamics of some orbital systems, influencing energy dissipation significantly. Their detailed understanding and precise quantification provide answers ranging from the fate of an orbit to the history of a planet. Achieving this understanding entails a stepwise incorporation of physical parameters, while accurate quantification demands...

60. Cosmic Shear Nulling as a geometrical cosmological probe: methodology and sensitivity to cosmological parameters and systematics

David Touzeau (CEA Saclay - IPhT)

10/04/2025 10:30

Astrophysics

Oral presentation

The Weak Lensing Shear is a powerful probe of cosmology. Along with Galaxy Clustering and the cross-correlation of those two probes, it gives the most effective set of Data, used by cosmological observations, to constrain cosmological parameters and study the large-scale structure of the universe. Yet, the nature of the Dark Energy, representing around 68% of the energy content of our current...

84. Generation of Cosmological Simulations via Diffusion Models

M. Mehdi NOOR (Institut d'Astrophysique Spatiale)

10/04/2025 10:45

Astrophysics

Oral presentation

Next-generation large galaxy surveys, such as Euclid and DESI, will provide unprecedented datasets to tackle fundamental cosmological questions: What is the nature of dark matter? What drives the accelerated expansion of the universe? Exploring these mysteries requires the analysis of the three-dimensional distribution of large-scale structures, collectively known as the cosmic web, which form...