• DOI:10.3847/2041-8213/ac1bb7
• Corpus ID: 233481897

Galaxy Rotation Curves Disfavor Traditional and Self-interacting Dark Matter Halos, Preferring a Disk Component or Einasto Function

@article{Loizeau2021GalaxyRC,
  title={Galaxy Rotation Curves Disfavor Traditional and Self-interacting Dark Matter Halos, Preferring a Disk Component or Einasto Function},
  author={Nicolas Loizeau and Glennys R. Farrar},
  journal={The Astrophysical Journal Letters},
  year={2021},
  volume={920}
}

• Nicolas Loizeau, G. Farrar
• Published 30 April 2021
• Physics
• The Astrophysical Journal Letters

We use the galaxy rotation curves in the SPARC database to compare nine different dark matter (DM) and modified gravity models on an equal footing, paying special attention to the stellar mass-to-light ratios. We compare three noninteracting DM models: a self-interacting DM model, two hadronically interacting DM models, and three modified Newtonian dynamics type models, modified Newtonian dynamics (MOND), a radial acceleration relation, and a maximal-disk model. The models with DM–gas interactions generate a disky component in the DM, which significantly improves the fits to the rotation curves compared to all other models except an Einasto halo; the MOND-type models give significantly worse fits.