Abstract

Invited Talk - Splinter Multimessenger

Thursday, 12 September 2024, 14:05   (S25)

Multi-messenger emission of blazas at parsec scales

Yuri Kovalev
MPIfR

Recent observations suggest that blazar cores are significant sources of high-energy neutrinos, with detected energies reaching several PeV. We employ Very Long Baseline Interferometry (VLBI) to investigate blazars at parsec scales. In this talk, we will summarize the fundamental properties of relativistic jets derived from up to 26 years of MOJAVE VLBA observations, with a specific focus on blazars identified as likely neutrino emitters. Blazar jets that are candidate neutrino sources typically exhibit smaller viewing angles, higher parsec-scale brightness, and greater Doppler boosting. Neutrinos are predominantly detected during flaring activity in active galaxies. This suggests that seed X-ray photons are generated either in the corona or in the jet near its base and constrains the region of proton acceleration and neutrino production by the p+gamma process to the central parsec(s) of blazars. The talk will conclude with a discussion of future prospects and observational programs targeting neutrino candidate blazars.