Constraints on Populations of Neutrino Sources from Searches in the Directions of IceCube Neutrino Alerts

Abbasi, R.; Ackermann, M.; Adams, J.; Aggarwal, N.; Aguilar, J.A.; Ahlers, M.; Alameddine, J.M.; Alves, A.A.; Amin, N.M.; Andeen, K.; Anderson, T.; Anton, G.; Argüelles, C.; Ashida, Y.; Athanasiadou, S.; Axani, S.N.; Bai, X.; A. 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doi:10.3847/1538-4357/acd2ca

Constraints on Populations of Neutrino Sources from Searches in the Directions of IceCube Neutrino Alerts

Atıf İçin Kopyala

Abbasi R., Ackermann M., Adams J., Aggarwal N., Aguilar J., Ahlers M., ...Daha Fazla

Astrophysical Journal, cilt.951, sa.1, 2023 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 951 Sayı: 1
Basım Tarihi: 2023
Doi Numarası: 10.3847/1538-4357/acd2ca
Dergi Adı: Astrophysical Journal
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH, Directory of Open Access Journals, DIALNET
Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

Beginning in 2016, the IceCube Neutrino Observatory has sent out alerts in real time containing the information of high-energy (E ≳ 100 TeV) neutrino candidate events with moderate to high (≳30%) probability of astrophysical origin. In this work, we use a recent catalog of such alert events, which, in addition to events announced in real time, includes events that were identified retroactively and covers the time period of 2011-2020. We also search for additional, lower-energy neutrinos from the arrival directions of these IceCube alerts. We show how performing such an analysis can constrain the contribution of rare populations of cosmic neutrino sources to the diffuse astrophysical neutrino flux. After searching for neutrino emission coincident with these alert events on various timescales, we find no significant evidence of either minute-scale or day-scale transient neutrino emission or of steady neutrino emission in the direction of these alert events. This study also shows how numerous a population of neutrino sources has to be to account for the complete astrophysical neutrino flux. Assuming that sources have the same luminosity, an E −2.5 neutrino spectrum, and number densities that follow star formation rates, the population of sources has to be more numerous than 7 × 10−9 Mpc−3. This number changes to 3 × 10−7 Mpc−3 if number densities instead have no cosmic evolution.