Séminaires LLR

The Galactic Centre as a powerful cosmic PeVatron

by Aion Viana (Max Planck Institute for Nuclear Physics (MPIK))

Europe/Paris
Seminar room (LLR)

Seminar room

LLR

Description
The Galactic Centre region has been observed by the High Energy Stereoscopic System (H.E.S.S.) I array of ground-based Cherenkov telescopes since 2004 leading to the detection of the very-high-energy (VHE, E > 100 GeV) gamma-ray source HESS J1745−290 spatially coincident with the supermassive black hole Sgr A*. Diffuse TeV gamma-ray emission has been detected along the Galactic ridge, most likely due to cosmic-ray interactions with the dense gas of the Central Molecular Zone. I will present the results of a detailed spectral and morphological study of the inner 200 pc of the Galactic Centre region based on the full data set of 2004-2013 observations. The new results allow us to make a strong statement regarding the location and origin of the accelerator of the parent ultrarelativistic particles. I will discuss possible implications of the observed emission, in particular, in the context of the origin of Galactic cosmic rays and large-scale emissions (Fermi bubbles, extraterrestrial neutrinos and others).
Poster
Slides