Association of IceCube neutrinos with major blazar flares

La prof.ssa Elina Lindfors (Tuorla Observatory, University of Turku), in visita a Bari, terrà un seminario sui temi dell'astrofisica multi-messaggera, in particolare sui possibili legami fra l'emissione di neutrini e i getti da nuclei galattici attivi.
  • What seminario ricerca
  • When Oct 30, 2023 from 03:00 PM (Europe/Berlin / UTC100)
  • Where Dipartimento Interateneo di Fisica - Aula A
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Identifying the most likely sources for high-energy neutrino emission has been one of the main topics in high-energy astrophysics ever since the first observation of high-energy neutrinos by the IceCube Neutrino Observatory. Active galactic nuclei with relativistic jets pointing close to our line of sight, blazars, have been considered to be one of the main candidates due to their ability to accelerate particles to high energies.

In our earlier study, we investigated the connection between radio emission and IceCube neutrino events using data from the Owens Valley Radio Observatory and Metsähovi Radio Observatory blazar monitoring programs. We found that even if all neutrino events are not accompanied with strong radio flares, when we see large amplitude radio flares in a blazar at the same time as a neutrino event, it is unlikely to happen by random coincidence. In this talk, I will give an update on these results using three years of additional data.

I will also show the first results from our study investigating the connection between optical flares and neutrino arrival times.