09. Woche 2019


Dienstag, 26.02.

 Astrophysics Seminar

Zeit, Ort:

14:00 Uhr,  Central seminar room, library building

Redner:

Dr. Luigi Tibaldo, IRAP, Toulouse, France

Titel:

Future observatories for MeV gamma-ray astronomy

Several space telescopes are exploring the sky in the hard X-ray/low-energy gamma-ray domain (< 500 keV: NuStar, Swift, INTEGRAL) and in the high-energy gamma-ray domain (> 100 MeV: Fermi LAT, AGILE). Conversely, the medium-energy gamma-ray band, around 1 MeV, remains basically unexplored since COMPTEL aboard CGRO (1991-2000). The MeV energy range is of great interest to understand the processes of particle acceleration in extreme astrophysical environments, to investigate the origin and role of high-energy particles on galaxy evolution, from cosmic rays to antimatter, and to probe nucleosynthesis and the chemical enrichment of the Milky Way. I will discuss how these questions could be tackled with a new space telescope for medium-energy gamma rays thanks to measurements of continuum emission, nuclear and annihilation lines, and polarization. I will then illustrate some proposals for future space-based MeV gamma-ray observatories.

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