Astroparticles, Astrophysics and Cosmology (A2C)
JAX-COSMO: An End-to-End Differentiable and GPU Accelerated Cosmology Library
Extrait de JAX-COSMO: An End-to-End Differentiable and GPU Accelerated Cosmology Library (https://arxiv.org/abs/2302.05163) We present jax-cosmo, a library for automatically differentiable cosmological theory calculations.jax-cosmo uses the JAX library, which has created…
Analysis methods to localize and characterize X-ray sources with the Micro-channel X-ray Telescope on board the SVOM satellite
SVOM is a Sino-French space mission targeting high-energy transient astrophysical objects such as gamma-ray bursts. The soft X-ray part of the spectrum is covered by the Micro-channel X-ray Telescope (MXT)…
The gamma emission of a nova predicted in great detail
On August 8, 2021, a "new" star appeared in the constellation of Ophiuchus and remained visible to the naked eye for several days. In fact, it had already been observed…
Vincent Tatischeff: Silver CNRS medal 2022
Vincent Tatischeff, research director (A2C pole, Astrophysics & Cosmochemistry), was rewarded with the CNRS silver medal, given by Vincent Poireau (IN2P3 DAS), in the presence of Sophie Henrot-Versillé, A2C director.…
Article: Observational constraints on cosmic-ray escape from ultra-high-energy accelerators
Energy flux of ultra-high energy cosmic rays at the Earth as a function of energy. The spectrum of all particles and the proton component are represented by black circles and…
Article: Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
Flux map at energies above 40 EeV with a top-hat smoothing radius of 25° in Galactic coordinates. The supergalactic plane is shown as a gray line. The blank area is…
Vincent Tatischeff: unlocking the secrets of cosmic rays
A specialist in high energy astrophysical phenomena, Vincent Tatischeff is the Director of Research at the Physics of two infinites – Irène Joliot-Curie laboratory (IJCLab – Université Paris-Saclay, Université Paris-Cité,…
Article: Limits to gauge coupling in the dark sector set by the non-observation of instanton-induced decay of Super-Heavy Dark Matter in the Pierre Auger Observatory data
Upper limits at 95\% C.L. on the effective coupling constant of a hidden gauge interaction as a function of the mass of a dark matter particle X decaying into quark/anti-quark…
Article: Predicted diffuse flux of ultra-high energy photons in the galactic plane; its implications for the search for super-heavy dark matter
Upper limits on diffuse photon fluxes for several energy thresholds, and expected fluxes from UHECRs interactions with the gas distribution in the Galaxy (grey dashed and blue dashed-dotted lines), as…