Oct 23 – 27, 2023
Istituto Veneto di Scienze, Lettere ed Arti
Europe/Rome timezone
opening day available in streaming on the YouTube channel of the Physics and Astronomy Dpt. of the University of Padova: https://youtu.be/t_9s2ALOFGQ

Observation of High-Energy Neutrinos from the Galactic Plane

Oct 24, 2023, 9:00 AM
20m
Palazzo Loredan,Sala delle Adunanze (Istituto Veneto di Scienze Lettere ed Arti)

Palazzo Loredan,Sala delle Adunanze

Istituto Veneto di Scienze Lettere ed Arti

Contributed Parallel Talk Neutrino Telescopes & Multi-messenger Neutrino Telescopes

Speaker

Mirco Hünnefeld (TU Dortmund University)

Description

IceCube has discovered a flux of astrophysical neutrinos and presented evidence for the first neutrino sources, a flaring blazar known as TXS 0506+056 and the active galaxy NGC 1068. However, the sources responsible for the majority of the astrophysical neutrino flux remain elusive. High-energy neutrinos can be produced when cosmic rays interact at their acceleration sites and during propagation through the interstellar medium. The Galactic plane has therefore long been hypothesized as a neutrino source.

In this contribution, new results are presented for searches of neutrino sources utilizing an improved cascade dataset that builds upon recent advances in deep-learning-based reconstruction methods. This work presents the first observation of high-energy neutrinos from the Milky Way Galaxy, rejecting the background-only hypothesis at 4.5$\sigma$. The neutrino signal is consistent with diffuse emission from the Galactic plane, potentially in combination with emission by a population of sources.

Primary author

Mirco Hünnefeld (TU Dortmund University)

Presentation materials