Super-Weakly Interacting Particles and the Formation of Galaxies and Clusters of Galaxies

Details Super-Weakly Interacting Particles and the Formation of Galaxies and Clusters of Galaxies Super-Weakly Interacting Particles and the Formation of Galaxies and Clusters of Galaxies

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pthph..70.1556h&link_type=abstract

Progress of Theoretical Physics, Vol. 70, No. 6, pp. 1556-1568

Physics

3

Scientific paper

We investigate whether adiabatic perturbations of massive neutrinos grow enough, during the matter-dominated era before and after decoupling, to explain the formation of clusters of galaxies, using the upper bounds on the small scale temperature fluctuations of the cosmic background radiation. The results are negative and similar constraints are derived for other super-weakly interacting particles. If we assume that the initial perturbations scale as δ ˜ M-1/2-n/6, then no objects form before z=3.78 for n=1, constant curvature fluctuations, whatever super-weakly interacting particle is introduced.

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