Organized by: Prof. Lu Lu
Multimessenger Probes of High-Energy Neutrino Production in AGN and Microquasars
Date: Thursday, October 23rd
Time: 2:30 pm - 3:30 pm
Place: Chamberlin 5280
Speaker: Jose Carpio, University of Nevada
Abstract: The discovery of astrophysical neutrinos by the IceCube Neutrino Observatory established neutrinos as a new messenger, opening a window to the most extreme particle accelerators in the Universe. Created in hadronic interactions, high-energy neutrinos are necessarily co-produced with γ-rays. The detection of neutrinos from NGC 1068, without accompanying γ-rays, thus reveals production in γ-ray–opaque environments, pointing to dense AGN cores as powerful accelerators. Meanwhile, IceCube's observation of Galactic neutrinos has opened a new front in understanding the sources of cosmic rays. Recent HAWC and LHAASO detections of >100 TeV γ-rays from microquasars such as SS 433 and V4641 Sgr show that compact binaries can also accelerate particles to high energies. This observation motivates targeted neutrino searches to determine whether the γ-rays are leptonic or hadronic in nature. In this talk, I will use the measured AGN neutrino spectra and γ-ray data to constrain source models and their contribution to the isotropic neutrino flux. In addition, I will use the γ-ray and X-ray data from SS 433 and V4641 Sgr to predict their neutrino fluxes from a hadronic component and assess their detection prospects with current and next-generation neutrino detectors.
Host: Lu Lu
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