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• W3100860168 abstract "We investigate the flux and event rate of supernova relic neutrinos (SRNs) and discuss their implications for the cosmic star formation rate. As reference models, we adopt the supernova rate model based on recent observations and the supernova neutrino spectrum numerically calculated by several groups. In the detection energy range E_e>10 MeV, which will possibly be a background-free region in the near future, the SRN event rate is found to be 1-2 yr^{-1} at a water Cerenkov detector with a fiducial volume of 22.5 kton, depending on the adopted neutrino spectrum. We also simulate the expected signal with one set of the reference models by using the Monte Carlo method and then analyze these pseudodata with several free parameters, obtaining the distribution of the best-fit values for them. In particular, we use a parameterization such that R_{SN}(z)=R_{SN}^0 (1+z)^alpha, where R_{SN}(z) is the comoving supernova rate density at redshift z and R_{SN}^0 and alpha are free parameters, assuming that the supernova neutrino spectrum and luminosity are well understood by way of a future Galactic supernova neutrino burst or the future development of numerical supernova simulations. The obtained 1sigma errors for these two parameters are found to be deltaalpha /alpha = 30% (7.8%) and delta R_{SN}^0/ R_{SN}^0 = 28% (7.7%) for a detector with an effective volume of 22.5 kton 5 yr (440 kton 5 yr), where one of the parameters is fixed. On the other hand, if we fix neither of the values for these two parameters, the expected errors become rather large, deltaalpha /alpha = 37% and delta R_{SN}^0/ R_{SN}^0 = 55%, even with an effective volume of 440 kton 5 yr." @default.
• W3100860168 created "2020-11-23" @default.
• W3100860168 creator A5044567744 @default.
• W3100860168 date "2004-05-20" @default.
• W3100860168 modified "2023-10-10" @default.
• W3100860168 title "Cosmic Star Formation History and the Future Observation of Supernova Relic Neutrinos" @default.
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• W3100860168 doi "https://doi.org/10.1086/383303" @default.
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