The discussion leader this tuesday is going to be Anna Franckowiak (DESY Zeuthen), and we will discuss the the "Multi-messenger astronomy with high-energy neutrinos".
The recent discovery of high-energy astrophysical neutrinos has opened a new window to the Universe. Combining neutrino data with electromagnetic measurements in a multi-messenger approach will increase the sensitivity to identify neutrino sources and help to solve long-standing problems in astrophysics such as the origin of cosmic rays.
In September 2017, the detection of a high-energy neutrino in coincidence with a flaring gamma-ray blazar revealed the first compelling high-energy neutrino source candidate. At the same time, gamma-ray blazars are disfavored as the dominant neutrino source class.
Other plausible source candidates are tidal disruption events (TDEs), low-luminosity gamma-ray bursts and supernovae. Those can be probed with optical surveys such as the Zwicky Transient Facility (ZTF), which enabled the detection of the TDE AT2019dsg in coincidence with a high-energy neutrino.
I will discuss the recent progress in neutrino multi-messenger astronomy and high-light blazars and TDEs as candidate source classes.