Volume 473 - 12th Neutrino Oscillation Workshop (NOW2024) - Session 4: Particle physics from the sky and the cosmos
Extra-galactic Star-forming Environments as Sources of High-Energy Neutrinos
A. Ambrosone
Full text: pdf
Published on: March 20, 2025
Abstract
Star-forming environments such as star-forming and Starburst Galaxies (SFGs and SBGs)
experience intense phases of stellar formation activity, which is expected to increase the amount of gas and magnetic turbulence leading to confinement of high-energy cosmic rays (CRs) and high probability of proton-proton (pp) collisions. Therefore, these
environments are expected to be powerful emitters of high-energy gamma-rays and neutrinos. In this contribution, using 15 years of public Fermi-LAT data, I will discuss the correlation between these
emissions with the star formation rate and I quantify that the SFG and SBG contribution cannot saturate the the isotropic gamma-ray background (IGRB) measured by Fermi-LAT while being consistent with a ∼20% contribution to the 6-year Cascade diffuse neutrino flux measured by the IceCube Neutrino Observatory.
DOI: https://doi.org/10.22323/1.473.0073
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