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arXiv · 2205.15963

Investigating the correlations between IceCube high-energy neutrinos and Fermi-LAT gamma-ray observations

Rong-Lan Li·Ben-Yang Zhu·Yun-Feng Liang
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Abstract

We use 10 years of publicly available IceCube data to investigate the correlations between high-energy neutrinos and various Fermi-LAT gamma-ray samples. This work considers the following gamma-ray samples: the third Fermi-LAT catalog of high-energy sources(3FHL), >100GeV Fermi-LAT events, LAT 12-year source catalog(4FGL), the fourth catalog of active galactic nuclei(4LAC) and subsets of these samples. For each sample, both a single-source analysis and a stacking analysis are performed. We find no indication that the sources in these samples produce significant high-energy neutrinos. From the null search results, we infer that each source population can produce no more than ~2.5%-36%(at the 95% confidence level, for a spectral index of -2.5) of the IceCube's diffuse neutrino flux. Since we are using a larger (10years) dataset of IceCube neutrinos the constraints are improved by a factor of ~2 compared to those based on 3 years of data.

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Rong-Lan Li, Ben-Yang Zhu, Yun-Feng Liang. 2022-05-31. Investigating the correlations between IceCube high-energy neutrinos and Fermi-LAT gamma-ray observations. https://doi.org/10.1103/physrevd.106.083024

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