出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the CMB anisotropy induced by the non-linear perturbations in
the massive neutrino density associated to the non-linear gravitational clustering. We
show that the non-linear time varying potential induced by the gravitational clustering
process generates metric perturbations that a
ect the time evolution of the density fluctuations
in all the components of the expanding Universe, leaving imprints on the CMB
anisotropy power spectrum at subdegree angular scales. For a neutrino fraction in agreement
with that indicated by the astroparticle and nuclear physics experiments and a
cosmological accreting mass comparable with the mass of known clusters, we nd that
CMB anisotropy measurements with Planck angular resolution and sensitivity possibly
combined to other precise cosmological observations will allow the detection of the
dynamical, linear and non-linear e
ects of the neutrino gravitational clustering.
