Objectif How well do we understand charged particle propagation in the solar system? This is an important topic for both astrophysics and space weather. Unfortunately, we still lack a fully predictive theory to this problem; a major challenge to this is the lack of cosmic-ray (CR) measurement throughout the solar system, as most data are measured locally on Earth. I propose to overcome this hurdle in my SolarIC project by using the solar inverse-Compton (IC) emission—produced by CR electrons scattering with Sunlight—as a remote probe for CR distribution throughout the solar system. I will achieve this through three main results. First, I will detect and analyze the solar IC emission with Fermi-LAT data to study its morphology and time dependence. Second, I will calculate the theoretical prediction of the solar IC emission for both GeV and MeV regimes, utilizing state-of-the-art CR simulations. This will be a theoretical foundation for interpreting the data. And for the first time, I will compute the polarization signatures of solar IC emission. Third, building on the previous two results, I will constrain and test contemporary models of CR propagation in the solar system through cross correlation of the Fermi-LAT data with the theory prediction. I will also perform a mock tomographic analysis of the solar IC emission, utilizing the polarization signature. This will be an important and novel prediction for the proposed future MeV space gamma-ray telescopes, such as e-ASTROGAM. Through my SolarIC project, I will demonstrate that solar IC emission can be used to provide valuable data and constraints on CR distribution in the solar system. This will be an important step leading to a better understanding of charged-particle propagation in the solar system, which will have significant impacts on many astrophysics disciplines including solar physics, cosmic-ray physics, neutrino astrophysics, and dark matter searches. Champ scientifique natural sciencesphysical sciencesastronomygalactic astronomysolar physicsnatural sciencesphysical sciencesastronomyastrophysicsdark matter Mots‑clés Gamma rays cosmic rays solar modulation dark matter neutrinos Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Thème(s) MSCA-IF-2018 - Individual Fellowships Appel à propositions H2020-MSCA-IF-2018 Voir d’autres projets de cet appel Régime de financement MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF) Coordinateur UNIVERSITEIT VAN AMSTERDAM Contribution nette de l'UE € 175 572,48 Adresse SPUI 21 1012WX Amsterdam Pays-Bas Voir sur la carte Région West-Nederland Noord-Holland Groot-Amsterdam Type d’activité Higher or Secondary Education Establishments Liens Contacter l’organisation Opens in new window Site web Opens in new window Participation aux programmes de R&I de l'UE Opens in new window Réseau de collaboration HORIZON Opens in new window Coût total € 175 572,48