Oral Presentation
Gravitational Slingshot as a Transport Mechanism to Alleviate Cold Dark Matter Small Scale Problems
In the Lambda cold dark matter (LCDM) model, N-body simulation predicts a power-law-like distribution in the inner regions of galaxies, which is in conflict with observational evidence suggesting approximately constant dark matter density distribution. This is the so-called cusp-core problem. Here we study gravitational slingshot as an acceleration mechanism for dark matter particles passing near to a massive object like a star. We calculate the average energy gain due to slingshot, then we construct a circular orbiting model to show how the dark matter is affected. Our study shows preferential increases energy of dark matter in regions of high stellar number density at galaxies centers, which flattens the dark matter distribution from the original cusp profile.
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