AI Article Synopsis
- A supermassive black hole in the galaxy NGC 1068, hidden by cosmic dust, is believed to power its active core, and neutrinos might help us understand this.
- Researchers analyzed data from the IceCube neutrino detector from 2011 to 2020 to detect neutrinos from various gamma-ray sources, including NGC 1068.
- They discovered an excess of high-energy neutrinos from NGC 1068, indicating a significant connection to the galaxy's activity, and these neutrinos were found to be much more abundant than previously measured gamma rays from the same source.
Article Abstract
A supermassive black hole, obscured by cosmic dust, powers the nearby active galaxy NGC 1068. Neutrinos, which rarely interact with matter, could provide information on the galaxy's active core. We searched for neutrino emission from astrophysical objects using data recorded with the IceCube neutrino detector between 2011 and 2020. The positions of 110 known gamma-ray sources were individually searched for neutrino detections above atmospheric and cosmic backgrounds. We found that NGC 1068 has an excess of [Formula: see text] neutrinos at tera-electron volt energies, with a global significance of 4.2σ, which we interpret as associated with the active galaxy. The flux of high-energy neutrinos that we measured from NGC 1068 is more than an order of magnitude higher than the upper limit on emissions of tera-electron volt gamma rays from this source.
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| http://dx.doi.org/10.1126/science.abg3395 | DOI Listing |
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