Studying the behaviour of High-Energy Neutrinos part2
1.Prospects for extending the core-collapse supernova detection horizon using high-energyneutrinos (arXiv)
Author : Nora Valtonen-Mattila, Erin O’Sullivan
Abstract : Large neutrino detectors like IceCube monitor for core-collapse supernovae using low energy (MeV) neutrinos, with a reach to a supernova neutrino burst to the Magellanic Cloud. However, some models predict the emission of high energy neutrinos (GeV-TeV) from core-collapse supernovae through the interaction of ejecta with circumstellar material and (TeV-PeV) through choked jets. In this paper, we explore the detection horizon of IceCube for core-collapse supernovae using high-energy neutrinos from these models. We examine the potential of two high-energy neutrino data samples from IceCube, one that performs best in the northern sky and one that has better sensitivity in the southern sky. We demonstrate that by using high-energy neutrinos from core-collapse supernovae, the detection reach can be extended to the Mpc range, far beyond what is accessible through low-energy neutrinos. Looking ahead to IceCube-Gen2, this reach will be extended considerably
2.Near-future discovery of point sources of ultra-high-energy neutrinos (arXiv)
Author : Damiano F. G. Fiorillo, Mauricio Bustamante, Victor B. Valera
Abstract : Upcoming neutrino telescopes may discover ultra-high-energy (UHE) cosmic neutrinos, with energies beyond 100 PeV, in the next 10–20 years. Finding their sources would expose the long-sought origin of UHE cosmic rays. We search for sources by looking for multiplets of UHE neutrinos arriving from similar directions. Our forecasts are state-of-the-art, geared at neutrino radio-detection in IceCube-Gen2. They account for detector energy and angular response, and for critical, but uncertain backgrounds. We report powerful insight. Sources at declination of −45∘ to 0∘ will be easiest to discover. Discovering even one steady-state source in 10~years would disfavor most known steady-state source classes as dominant. Discovering no transient source would disfavor most known transient source classes as dominant. Our results aim to inform the design of upcoming detectors
3.Investigating the correlations between IceCube high-energy neutrinos and Fermi-LAT gamma-ray observations (arXiv)
Author : RongLan-Li, BenYang-Zhu, YunFeng-Liang
Abstract : We use 10 years of publicly available IceCube data to investigate the correlations between hight-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 activate galactic nuclei(4LAC) and subsets of these samples. For each sample, both a single-source analysis and a joint likelihood analysis are performed. We find no indication that the sources in these samples produce significant high-energy neutrinos .From the null search result, we infer that each source population can produce no more than ~0.3%-27% (at the 95% confidence level) of the IceCube’s diffuse neutrino flux. Since we are using a larger(10 years) dataset of IceCube neutrinos , the constriants are improved by a factor of ~2 compared to those based on 3 years of data
