13.05.14 16:00

Astronomical data contradict the existence of dynamically relevant cold or warm dark matter

Pavel Kroupa (Bonn)

The dual-dwarf-galaxy theorem, according to which two types of galaxies must exist and which must be true in the standard model of cosmology, is falsified by astronomical data. Both types of dwarf galaxy, those with putative exotic dark matter and those known to not contain dark matter even if it were to exist, cannot be distinguished by observation. Furthermore, the arrangement of satellite galaxies in rotating disk-like vast near-polar structures around the Milky Way and Andromeda galaxies and the frequent occurrence of anisotropic flattened satellite populations around major galaxies, are consistent with the conclusion that only one type of satellite dwarf galaxy exists, namely the type wthout dark matter. Dynamically relevant cold or warm dark matter therefore cannot exist. Searching for such dark matter, or attempting to find theoretical particle-physics reasoning for the existence of such dark matter, is thus futile. Instead and as suggested by Milgrom, scale-invariant dynamics is showing a new direction for understanding the astrophysics of galaxies. Galaxies are observed to be simple systems following laws that result from scale-invariant dynamics which do not emanate from the haphazard merging history of halos of exotic dark matter. As a result, the entire present-day cosmological description of galaxy formation and evolution is not correct and needs major revision.



The slides of this talk can be found here.


Different Location: Seminar room 1, HISKP

Kategorie: Kolloquium