Tuesday, March 21, 2023 3:30pm to 4:30pm
About this Event
View mapColloquium with Dr. Henrike Fleischhack, Assistant Research Scientist, NASA Goddard Space Flight Center
For more than a hundred years, we have known about cosmic rays, energetic charged particles impinging upon the Earth’s atmosphere from all directions. We have learned much about these particles and the cosmic accelerators that produce them, but many mysteries remain. In this talk, I will explain how we use multi-messenger data, including gamma-ray astronomy, to search for and study the sources of the most energetic cosmic rays inside and outside of our Milky Way. I will present the case of supernova remnant G106.3+2.7, recently identified as a source of energetic protons, as an example of how galactic "PeVatrons" can be identified. I will also speak to particle acceleration and multi-messenger signals from extra-galactic particle accelerators. I will show the challenges to be overcome and outline how future detectors can help understand cosmic accelerators even better.
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