Fitting the Galaxy Rotation Curves: Strings versus NFW profile
High Energy Physics - Theory
2008-10-15 v1
Abstract
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.
Cite
@article{arxiv.0810.2382,
title = {Fitting the Galaxy Rotation Curves: Strings versus NFW profile},
author = {Yeuk-Kwan E. Cheung and Feng Xu},
journal= {arXiv preprint arXiv:0810.2382},
year = {2008}
}