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Multimessenger Astrophysics of High-Energy Cosmic Neutrinos

IGC apple Logo created by Monica Rincon Ramirez

The discovery of high-energy astrophysical neutrinos by the IceCube Collaboration and, subsequently, the identification of the z = 0.352 blazar TXS 0506+056, the Seyfert 2 galaxy NGC 1068, and the Galactic plane as sources of some of these neutrinos, has inaugurated a new era of high-energy neutrino astronomy. This is a promising time to capitalize on IGC strengths in neutrino observations and multimessenger modeling to advance our understanding of the physics and astrophysics of neutrino sources. Studies of candidate neutrino source populations have reached the point where joint constraints from the neutrino and electromagnetic (EM) sectors provide important insights into the properties of multiple source classes, including AGN, GRBs, TDEs, SNe, and compact object mergers– all areas of expertise for multiple IGC faculty. This Focus Initiative will advance the science for experimental searches to be pursued in the near term, including studies focusing on AGN (Active Galactic Nuclei), GRBs (Gamma-Ray Bursts), tau neutrinos, Multimessenger Modeling of AGN and GRBs, experiments opening the UHE (Ultra-High-Energy) neutrino frontier, and neutrino probes of Beyond Standard Model physics.

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About our wordmark
Monica Rincon Ramirez

The IGC wordmark was created by Monica Rincon Ramirez while she was a graduate student at the Institute. Monica enjoys drawing new connections between fundamental theory and observations. Her graduate work included general relativity, loop quantum gravity, and quantum fields in cosmological backgrounds; her thesis focused on effective quantum corrections to gravitational phenomena from spinfoams and applications to cosmology. She received her PhD in 2024.

The wordmark symbolizes the scope of research at the IGC. The base represents quantum gravity, evoking the quantum geometrical picture from spinfoams and loop quantum gravity — approaches studied at the Center for Fundamental Theory. The middle shows galaxies embedded in a smooth surface characteristic of spacetime in general relativity and the larger physical scales studied at the Center for Theoretical and Observational Cosmology. The top curves to an extreme representing a supermassive black hole accompanied by an energetic jet, with a binary black hole pair nearby — the high-energy phenomena studied at the Center for Multimessenger Astrophysics.