Contributed Talk - Splinter RadioSky

Tuesday, 13 September 2022, 15:42   (SFG 1030 / virtual RadioSky)

The Impact of Southern-Hemisphere Radio Blazar Observations on Neutrino Astronomy

Florian Rösch (1), Matthias Kadler (1), Eduardo Ros (2), Roopesh Ojha (3), Florian Eppel (1), Philip G. Edwards (4), Jamie Stevens (4), Petra Benke (2)
(1) Institut für Theoretische Physik und Astrophysik, Universität Würzburg; (2) Max-Planck-Institut für Radioastronomie; (3) NASA HQ; (4) CSIRO Space and Astronomy

Circumstantial evidence now shows that some high-energy cosmic neutrinos detected by modern neutrino telescopes can be associated with blazars. A growing number of such individual-source associations opens for the first time the possibility for systematic astronomical studies of neutrino-emitting blazar jets. In the next decade, the rapidly growing KM3NeT, located in the Mediterranean sea, is going to join IceCube, located at the south pole, in yielding complementary neutrino data in both hemispheres. In addition, many neutrino-candidate blazars are located at low declinations near the celestial equator so that enhanced and even superior coverage can be achieved by joint observations from both hemispheres. Ongoing synergetic approaches are currently followed by northern- and southern-hemisphere VLBI monitoring programs such as MOJAVE/TANAMI as well as from single-dish spectral monitoring with the Effelsberg 100-m telescope (TELAMON) and with the Australian Telescope Compact Array (ATCA, as part of the TANAMI program). In the near future, the high-frequency northern ngVLA and the low-frequency southern SKA will team up for complementary high-resolution and high-sensitivity studies of different classes of neutrino-emitting relativistic jets in active galaxies.