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Comparison of the Black Hole and Fermion Ball Scenarios of the Galactic Center
Neven Bilic, Faustin Munyaneza, Gary B. Tupper +1
After discussion of the properties of degenerate fermion balls, we analyze the orbit of the star S0-1, which has a projected distance of ~5 light-days to Sgr A*, in the supermassiv…
Dark Matter, Dark Energy and the Chaplygin Gas
Neven Bilic, Gary B. Tupper, Raoul D. Viollier
We formulate a Zel'dovich-like approximation for the Chaplygin gas equation of state P = -A/rho, and sketch how this model unifies dark matter with dark energy in a geometric setti…
Dark matter in the Galaxy
Neven Bilic, Gary B. Tupper, Raoul D. Viollier
After a brief introduction to standard cosmology and the dark matter problem in the the Universe, we consider a self-gravitating noninteracting fermion gas at nonzero temperature a…