Conveners
Galactic Sources: - 1
- Silvia Celli (Istituto Nazionale di Fisica Nucleare)
- Alison Mitchell
Galactic Sources: - 2
- Silvia Celli (Istituto Nazionale di Fisica Nucleare)
- Alison Mitchell
The search of Galactic sources able to accelerate cosmic rays (CR) up to energies of ~PeV (the so-called PeVatrons) is one of the most active research topic in the field of high energy Astrophysics. For decades supernova remnants have been considered the most promising candidates but deep gamma-ray observations and theoretical developments suggest that such sources are unable to produce PeV...
Young massive stellar clusters are extreme environments, and potentially provide the means for efficient particle acceleration. Indeed, they are increasingly considered as being responsible for a significant fraction of cosmic rays (CRs) accelerated within the Milky Way. Westerlund 1, the most massive known young stellar cluster in our Galaxy is a prime candidate for studying this hypothesis....
High-energy $\gamma$ rays, originating from interactions of cosmic rays (CRs) with the interstellar medium (ISM), carry direct information about the spatial and spectral distribution of these relativistic particles. Observations of Fermi-LAT of the diffuse gas unveiled a higher emissivity and a harder spectral index in the inner part of the Galaxy. Analyses of the diffuse emission however are...
The Galactic Center (GC) is an intriguing lab for non-thermal astrophysics due to its proximity and its transparency in radio, X-ray and γ bands. In addition to hosting a supermassive black hole, a compact luminous young star cluster, and the circumnuclear ring, the central few parsecs of the Milky Way are also notable for hosting a source of cosmic rays extending up to PeV in energy $-$ the...
The Tibet ASγ and LHAASO collaborations recently provided the first evidence of a diffuse γ-ray emission in the Galaxy up to the PeV from the Galactic plane. 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 diffuse...
TeV halos have become a new class of astrophysical objects which were not predicted before their recent observation. They offer evidence that diffusion around sources (concretely, pulsars) is not compatible with the effective average diffusion that our models predict for the Galaxy. This directly impacts Galaxy formation, our knowledge of the propagation process throughout the Galaxy and our...
RS Ophiuchi (RS Oph) is a symbiotic recurrent nova that shows eruptive events roughly every 15 years. On August 8th August 2021, RS Oph erupted with its latest outburst. This event was detected with a wide range of multi-wavelength (MWL) instruments from radio up to very-high-energy (VHE) gamma rays. The MAGIC telescopes followed up on optical and high-energy triggers and initiated an...
