Fitting the Galaxy Rotation Curves: Strings versus NFW profile

Details Fitting the Galaxy Rotation Curves: Strings versus NFW profile Fitting the Galaxy Rotation Curves: Strings versus NFW profile

2008-10-14

arxiv.org/abs/0810.2382v1

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

Remarkable fit of galaxy rotation curves is achieved using a simple model from string theory. The rotation curves of the same group of galaxies are also fit using dark matter model with the generalized Navarro-Frenk-White profile for comparison. String model utilizes three free parameters vs five in the dark matter model. The average chi-squared of the string model fit is 1.649 while that of the dark matter model is 1.513. The generalized NFW profile fits marginally better at a price of two more free parameters.

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