Konwersatorium im. J.Pniewskiego i L.Infelda
sala 0.03, ul. Pasteura 5
2019-05-13 (16:30) 
prof. Pavel Kroupa (University of Bonn and Charles University in Prague)
Detecting dark matter
Neither the standard model of particle physics nor direct detection experiments have yielded any need nor any evidence for the existence of cold or warm dark matter particles. These are only hypothesised to exist if general relativity is extrapolated from the Solar-system scale to galaxies and beyond. I will discuss the possibility of confirming the existence of such dark matter particles using Chandrasekhar dynamical friction. Explicit test cases are the satellite galaxies of the Milky Way, the M81 group of galaxies and Hickson compact groups. The observed highly symmetric arrangement of matter on Mpc scales in the Local Group remains entirely unexplained by current cosmological and dynamical theory. The evidence gathered consistently and unanimously shows that dark matter particle cannot be present.