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FEATURES & HIGHLIGHTS

Cosmic Rays Provide a Unique View of the Universe

Identifying the galactic and extragalactic sources of these energetic charged particles remains critical to understanding the underlying astrophysics of the Universe. USRA scientists are actively involved in developing ground-based, sub-orbital, and space-based instruments that will answer lingering questions: how does the nuclear composition of Cosmic Rays change with energy? What does this convey about the sources and how are Cosmic Rays accelerated? Is there a signature for local sources or even dark matter annihilation? Where does the extragalactic spectrum begin and at what energy does the galactic Cosmic Ray spectrum end?


A senior USRA/CRESST scientist is a Co-Investigator on CALET and serves as co-chair of the US-portion of the CALET Modeling and Simulation group. The central goal of CALET is to significantly extend the high-energy limit of measurements of cosmic ray electrons, searching for signatures caused by local sources or by dark matter annihilation. CALET will also perform measurements of the cosmic ray nuclear spectrum and sources of gamma rays.

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Identifying the galactic and extragalactic sources of energetic charged particles remains critical to understanding the underlying astrophysics of the Universe.