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arXiv · 2308.00024

Searching for High-Energy Neutrino Emission from Seyfert Galaxies in the Northern Sky with IceCube

Theo Glauch·Ali Kheirandish·Tomas Kontrimas·Qinrui Liu·Hans Niederhausen
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Abstract

The recent detection of TeV neutrino emission from the nearby active galaxy NGC 1068 by IceCube suggests that AGN could make a sizable contribution to the total high-energy cosmic neutrino flux. The absence of TeV gamma rays from NGC 1068, indicates neutrino production originates in the innermost region of the AGN. Disk-corona models predict a correlation between neutrinos and keV X-rays in Seyfert galaxies, a subclass of AGN to which NGC 1068 belongs. Using 10 years of IceCube through-going track events, we report results from searches for neutrino signals from 27 additional sources in the Northern Sky by studying both the generic single power-law spectral assumption and spectra predicted by the disk-corona model. Our results show excesses of neutrinos associated with two sources, NGC 4151 and CGCG 420-015, at 2.7$\sigma$ significance, and at the same time constrain the collective neutrino emission from our source list.

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Theo Glauch, Ali Kheirandish, Tomas Kontrimas, Qinrui Liu, Hans Niederhausen. 2023-07-31. Searching for High-Energy Neutrino Emission from Seyfert Galaxies in the Northern Sky with IceCube. https://arxiv.org/abs/2308.00024

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