Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 66: Neutrino astronomy 3

T 66.4: Vortrag

Mittwoch, 6. März 2024, 16:45–17:00, Geb. 30.23: 6/1

Stacking Analysis of Extreme Blazars as Neutrino Source Candidates — •Juan Manuel Cano Vila^1,2, Chiara Bellenghi¹, Paolo Padovani³, and Elisa Resconi¹ — ¹Technical University of Munich, TUM School of Natural Sciences, Department of Physics, James-Franck-Straße 1, D-85748 Garching bei München, Germany — ²Arnold Sommerfeld Center, Ludwig-Maximilians University, 80333 Munich, Germany — ³European Southern Observatory, Karl- Schwarzschild-Straße 2, D-85748 Garching bei München, Germany

Since IceCube Neutrino Observatory confirmed the existence of high-energy astrophysical neutrinos, enormous efforts have been made to determine which kind of objects emit them. Blazars constitute one of the most promising candidates as astrophysical neutrino sources, with evidence of emission from TXS 0506+056. Although it has been shown that blazars can only account for a fraction of the astrophysical diffuse flux, it remains open whether they can be identified as sources of high-energy neutrinos, especially the most energetic ones. One way to tackle this problem is to study the joint signal from multiple selected sources through an unbinned stacking log-likelihood analysis, enhancing the statistics by a population-wide study in this way. In this work, we perform such analysis with the IceCube 10 yr public data sample to a catalog of these extreme blazars.

Keywords: Neutrino Astronomy; Blazars; High Energy Astrophysics