On the rotation curves for axially symmetric disk solutions of the Vlasov-Poisson system
Journal article, 2015

A large class of flat axially symmetric solutions to the Vlasov–Poisson system is constructed with the property that the corresponding rotation curves are approximately flat, slightly decreasing or slightly increasing. The rotation curves are compared with measurements from real galaxies and satisfactory agreement is obtained. These facts raise the question whether the observed rotation curves for disc galaxies may be explained without introducing dark matter. Furthermore, it is shown that for the ansatz we consider stars on circular orbits do not exist in the neighbourhood of the boundary of the steady state.

methods: numerical

methods: analytical

galaxies: structure


Håkan Andreasson

Chalmers, Mathematical Sciences, Mathematics

University of Gothenburg

G. Rein

University of Bayreuth

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 446 4 3932-3942

Subject Categories


Physical Sciences

Astronomy, Astrophysics and Cosmology



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