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Accueil > Séminaires > Archive des séminaires d’Utinam > 2018

André Maeder

Scale invariant theory and dark matter, observational tests in cosmology and galactic physics

jeudi 24 mai 2018, 14h00

Salle de conférences de l’observatoire

André MAEDER

Observatoire de Genève

Résumé :

The basics of the scale invariant theory are briefly presented. A dozen of tests in cosmology and galaxy physics are already performed. No dark matter appears necessary to account for the high rotation of galaxies and for the high velocity dispersion in clusters of galaxies. A remarkable relation between the centripetal acceleration of galaxies and their baryon gravities has been found by Lelli et al. (2017). At low gravities, it shows large deviations from the 1:1 line. These deviations are correctly described in the scale invariant context.
The growth of the density fluctuations is studied from the continuity, Poisson and Euler equations in the scale invariant context. The growth is found much faster than in the standard models, with galaxies forming at redshifts of a few tens, without the need of dark matter.

Références

A. Maeder, Dynamical Effects of the Scale Invariance of the Empty Space : The Fall of Dark Matter ?, The Astrophysical Journal, 849 (2), 158, 2017

A. Maeder, Scale-invariant Cosmology and CMB Temperatures as a Function of Redshifts, The Astrophysical Journal, 847(1), 65, 2017

Dans les media

L’existence de la matière noire et de l’énergie noire remise en question (Actualités de l’Université de Genève)

Une remise en question de la matière noire et de l’énergie noire (Radio-Télévision Suisse)

L’existence de la matière noire et de l’énergie noire remise en question (EurekAlert)

Matière noire : et si elle n’existait pas ? (France Culture)

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