La masse manquante dans l'Univers.

Details La masse manquante dans l'Univers. La masse manquante dans l'Univers.

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989anph...14..347m&link_type=abstract

Ann. Phys. (Paris), Vol. 14, No. 3, p. 347 - 375

Physics

1

Universe: Missing Mass, Cosmology: Dark Matter, Galactic Halos: Dark Matter

Scientific paper

The first evidence for missing mass or dark matter comes from the 30's. Zwicky concluded that the velocity dispersion of galaxies in Coma required 100 times more mass than contained in galaxies. Since this period, refined observations, analyses and a reevaluation of the cosmic distance scale reduced this factor but the problem is still present. It is particularly striking for spiral galaxies where systematic observations of rotation curves lead to infer the presence of spherical massive halos. These dynamical evidences form the "first missing mass problem". The "second one" appears with the development of Grand Unified Theories for which the natural laboratory is the very early Universe. A consequence of these theories is that our Universe could be closed by "exotic" particles which interact only gravitationally. The author tries to shed some light on this dark matter asking for its content and nature.

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