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Organized by: Prof. Lu Lu

Events During the Week of December 17th through December 24th, 2023

Monday, December 18th, 2023

No events scheduled

Tuesday, December 19th, 2023

No events scheduled

Wednesday, December 20th, 2023

No events scheduled

Thursday, December 21st, 2023

Neutrino signal from Cygnus region of the Milky Way
Time: 2:30 pm - 3:30 pm
Place: virtual via zoom
Speaker: Andrii Neronov, Ecole Polytechnique (Lausanne) and Astroparticle and Cosmology laboratory (Paris)
Abstract: Interactions of cosmic ray protons and nuclei in their sources and in the interstellar medium produce "hadronic" gamma-ray emission. Gamma-rays can also be of "leptonic" origin, i.e. originating from high-energy electrons accelerated together with protons. It is difficult to distinguish between hadronic and leptonic emission mechanisms based on gamma-ray data alone. This can be done via detection of neutrinos, because only hadronic processes lead to neutrino production. We use publicly available ten-year IceCube neutrino telescope dataset to demonstrate the hadronic nature of high-energy emission from the direction of Cygnus region of the Milky Way. We find a 3-sigma excess of neutrino events from an extended Cygnus Cocoon, with the flux comparable to the flux of gamma-rays in the multi-TeV energy range seen by HAWC and LHAASO telescopes.
Host: Lu Lu
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Friday, December 22nd, 2023

No events scheduled