Warning: following the coronavirus emergency, all the talks will be given remotely online. The link to connect to the seminar will be available in due time. A playlist of the remote talks already online is available on our YouTube channel »
Life and death of a cosmic particle in the Galaxy
Carmelo Evoli (GSSI)
Tuesday 07/07/2020 @ 14:00, Google Hangouts Meet
Understanding the cosmic-ray (CR) transport in the Milky Way magnetic field is fundamental to unveil their galactic factories. While we know now they can be created in supernovas, there may be other sources available for CR acceleration. To trace back CR origins we can look at what they are made of. By weighing the different isotopes of elements that hit CR detectors, we can infer global properties as the galactic grammage and escape time. These quantities are crucial to test any more fundamental description of the transport of charged particles in the interstellar plasma. The AMS-02 mission is scrutinising the CR composition with an unprecedented sensitivity, also revealing unexpected new features in the element spectra. While these fresh puzzles are thriving unorthodox novel approaches, the old-fashioned Galactic halo model is striving to survive. The battle just started.
Link to the recorded talk: youtu.be/LrpbOyVbL3g