Mario E. de Souza. An Alternative Model for the Rotation of Spiral Galaxies: the Connections Among Shape, Kinematics and Evolution
Submitted on: Mar 26, 2012, 19:59:40
Natural Sciences / Astronomy / Cosmology
Description: It is proposed that the arms of spiral galaxies are formed by the continuous outflow of matter from their centers. It is then shown that the ratio between the radial and tangential velocities of the outflow is the parameter responsible for the logarithmic spiral structure of spiral galaxies. The fitting of some spiral galaxies to the model allows the calculation of the radial velocities of matter in these galaxies and such values completely agree with the observational data. An approximate general equation is proposed for the description of the arms of spiral galaxies with or without bars. Some important consequences are discussed with respect to dark matter, galactic evolution and cosmology. It is concluded that a quantitative representation of the dynamics of the spiral galaxies can be entirely represented with data on their formation without any need to use the far-reaching conjecture of dark matter. The article was accepted into the Hadronic Journal, vol. 35, No. 01, 2012.
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Alternative Model for the Rotation of Spiral Galaxies.pdf