Viscous, rotating accretion of modified Chaplygin gas dark energy onto a supermassive black hole produces a threshold drop in accretion density and a stronger wind.
A model for a dark matter core at the galactic center
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abstract
We consider a toy model for the supermassive compact object at the galactic center that does not require the presence of a black hole. We assume a matter distribution of weakly interacting particles with a density profile inferred from dark matter profiles in the outer regions. We show that rotation curves close to the center of the Milky Way galaxy can be explained within this model. We also show that the motion of test particles (stars) at distances of the order of 100 astronomical units can not be distinguished from the motion of corresponding particles in the Schwarzschild geometry. However, differences arise at shorter distances, suggesting that it could be possible to observationally test the validity of the model in the near future.
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gr-qc 1years
2019 1verdicts
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Threshold Drop in Accretion Density if Dark Energy is Accreting onto a Supermassive Black Hole
Viscous, rotating accretion of modified Chaplygin gas dark energy onto a supermassive black hole produces a threshold drop in accretion density and a stronger wind.