München 2019 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

GR: Fachverband Gravitation und Relativitätstheorie

GR 13: Alternative Approaches to Quantum Gravity

GR 13.5: Talk

Thursday, March 21, 2019, 16:00–16:15, HS 5

Surrounding — •Frederic Lassiaille — Nice, France

SMT (Surrounding Matter Theory), an alternative theory to dark matter, is presented. It is based on a modification of Newton's law. This modification is done by multiplying a Newtonian potential by a given factor, which is varying with local distribution of matter, at the location where the gravitational force is exerted. With this new equation the model emphasizes that a gravitational force is roughly inversely proportional to mass density at the location where this force is applied. After presentation of the model, its dynamic is quickly applied to cosmology and galaxy structure. Some possible caveats of the model are identified. But the simple mechanism described above suggests the idea of a straightforward solution to the following issues: virial theorem mystery, the value of cosmological critical density, the fine tuning issue, and expansion acceleration. A de Sitter Universe is predicted. The predicted time since last scattering is 68 h-1 Gyr. With this value the heterogeneities of large scale structures and galaxy formation might be better explained. Simulations of the stars in a galaxy have been executed with SMT. They show interesting speed profiles, and the fact that ring galaxies seems to be generated by SMT dynamic itself, without the help of any particular external event. Those studies give motivation for scientific comparisons with experimental data.