Cosmic neutrino backgroundとは 意味・読み方・使い方

名詞

cosmic neutrino background (uncountable)

1. (astronomy) The universe's background particle radiation composed of neutrinos.

   Alternative forms: CNB, CνB, CvB (initialisms)

   Holonyms: cosmic background, cosmic background radiation < electromagnetic radiation < radiation

   Comeronyms: CMB, CμB, cosmic microwave background; CIRB, CIB, cosmic infrared background; CGWB, CGB, cosmic gravitational-wave background

   • 2014, [1]

     The importance of detecting Cosmic Neutrino Background is that, although detailed studies of Big Bang Nucleosynthesis and Cosmic Microwave Background give information of the early Universe at ~a few minutes old and ~300 k years old, respectively, observation of Cosmic Neutrino Background allows us to study the early Universe at ~1 s old.

   • 2013, [2].

     Information about earlier times can, in principle, be derived from the Cosmic Neutrino Background (relic neutrinos). The neutrinos decouple already about 1 second after the Big Bang at a temperature of around 1 MeV or 10^{10} Kelvin. Today their temperature is about 1.95 Kelvin. Registration of these neutrinos is an extremely challenging experimental problem, which can hardly be solved with the present technologies