Dark matter and planes of corotating satellite galaxies

Stéphane Le Corre (1)

1 Chercheur indépendant

We propose a new model to explain the reported excess of corotating satellite pairs located near diametric opposition with respect to their host (i.e. at opening angles of α < 8 •) detected in the Sloan Digital Sky Survey (SDSS) data. This model also allow explaining the precipitous drop in the corotating fraction over 8 • < α < 28 • and the no overabundance of corotating satellite pairs for greater angles. Furthermore, this model predicts two other unexpected features that could be tested now in the SDSS data, the correlation between the distance of hosts' galaxies and the angle of the planes of corotating satellites and the spatial extent of this correlation. This new model has been proposed to explain dark matter without modifying the gravitation's laws, without introducing new matter and in the frame of general relativity. The verification of these two new predictions would be a very strong validation of this model of " dark matter " and would put very strong constraints on the other models.

Mots clés: Local Group; galaxies:formation; galaxies:dwarf; galaxies:evolution; galaxies:star formation; cosmology:dark matter

Domaines: Astrophysique galactique [astro-ph.GA]

Stéphane Le Corre. Dark matter and planes of corotating satellite galaxies. 2015. ⟨hal-01239270⟩