23–27 Sept 2024
Hotel Villa Tuscolana
Europe/Rome timezone

The Galactic diffuse gamma-ray and neutrino emission at the PeV frontier

25 Sept 2024, 17:07
17m
Sala Vittorio Emanuele

Sala Vittorio Emanuele

Speaker

Daniele Gaggero (Istituto Nazionale di Fisica Nucleare)

Description

The Tibet ASγ and LHAASO collaborations recently provided the first evidence of a diffuse γ-ray emission from the Galactic plane up to the PeV. Due to the challenges this imposes to current theoretical models it is crucial to carefully study different scenarios of diffuse γ-ray production, specially towards the centre of the Galaxy. In particular, the current models of Galactic diffuse γ-ray emission struggle to reproduce ASγ and LHAASO measurements, while consistently reproducing the lower energy data.
In this contribution, we show that these measurements seem to favour an inhomogeneous transport of cosmic rays throughout the Galaxy, specially motivated by the Fermi-LAT detector. Moreover, we discuss the relevance of non-uniform cosmic-ray transport scenarios and the possible detectability of the associated diffuse Galactic neutrino emission by IceCube or Km3Net in the next years.

Primary authors

Antonio Marinelli (Istituto Nazionale di Fisica Nucleare) Daniele Gaggero (Istituto Nazionale di Fisica Nucleare) Dario Grasso (Istituto Nazionale di Fisica Nucleare and Embassy of Italy, The Hague) Pedro De la Torre Luque (Institute of theoretical physics (IFT))

Presentation materials