Diffuse Cosmic Neutrino Background from Population III Stars

Details Diffuse Cosmic Neutrino Background from Population III Stars Diffuse Cosmic Neutrino Background from Population III Stars

2004-11-18

arxiv.org/abs/astro-ph/0411545v1

Astropart.Phys. 23 (2005) 303-312

Astronomy and Astrophysics

Astrophysics

17 pages, 7 figures

Scientific paper

10.1016/j.astropartphys.2005.01.

We study the expected diffuse cosmic neutrino flux produced by Population III (PopIII) stars during their nuclear burning phases as well as from their final stages of evolution (core collapse). Assuming a fraction f_III=10^(-3) of all baryons forms PopIII stars, our flux estimate is comparable to the diffuse neutrino flux produced by the ordinary stars and by the ordinary core-collapse supernovae in the universe, i.e. of order 1-10 cm^(-2) s^(-1). Due to the large cosmic redshift, however, the typical energies are in the MeV and sub-MeV range where the solar and geophysical neutrino fluxes are much larger. A direct detection of the diffuse cosmic flux is out of the question with presently known experimental techniques.

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