Dark matter explanation from quasi-metric gravity
Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, N-7491, Trondheim, Norway
Accepted: 25 June 2013
Published online: 16 July 2013
The gravitational field of an isolated, axisymmetric flat disk of spinning dust is calculated approximatively in the weak-field limit of quasi-metric gravity. Boundary conditions single out the exponential disk as a “preferred” physical surface density profile. Moreover, collective properties of the disk, in the form of an extra “induced associated” surface density playing the role of “dark matter” also emerge. Taken as an idealized model of spiral galaxy thin disks, it is shown that including this “dark matter” into the model as a gravitating source yields asymptotically flat rotation curves and a correspondence with MOND.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2013