Speaker
Description
Blazars are characterized by relativistic jets oriented at a small angle to the observer's line of sight. They are among the most powerful and long-lived astrophysical sources in the Universe, with spectral energy distributions spanning 20 orders of magnitude of frequencies. The recent observation of a neutrino, coincident with a flaring blazar, TXS 0506+056, has opened a new era in blazar research – that of multi-messenger observations when a blazar can be studied by detecting photons and neutrinos. I will review the recent possible association between neutrinos and blazars and present multimessenger blazar spectral energy distribution modelling using the SOPRANO code. SOPRANO is a new, conservative, implicit kinetic code that traces the time evolution of isotropic distribution functions of protons, neutrons, and secondary products from photo-pion and photo-pair interactions, alongside the evolution of photon and electron/positron distribution functions. I will also focus on the blazar PKS 0735+178, which is potentially associated with multiple neutrino events as observed by the IceCube, Baikal, Baksan, and KM3NeT neutrino telescopes. I will present a detailed study of this peculiar blazar, investigating the temporal and spectral changes in multi-wavelength emission when the neutrino events were observed as well as will also present results from comprehensive modelling of the multi-wavelength emission from PKS 0735+178 within lepto-hadronic models.
| Submitted on behalf of a Collaboration? | No |
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