Galaxy Rotation Curves Without Non-Baryonic Dark Matter

Details Galaxy Rotation Curves Without Non-Baryonic Dark Matter Galaxy Rotation Curves Without Non-Baryonic Dark Matter

2005-06-16

arxiv.org/abs/astro-ph/0506370v4

Astrophys.J.636:721-741,2006

Astronomy and Astrophysics

Astrophysics

43 pages, 7 figures, 4 tables, 101 galaxies. Submitted to ApJ, June 20, 2005. Accepted for publication in ApJ, September 21, 2

Scientific paper

10.1086/498208

We apply the modified acceleration law obtained from Einstein gravity coupled explaining galaxy rotation curves without exotic dark matter. Our sample of galaxies includes low surface brightness (LSB) and high surface brightness (HSB) galaxies, and an elliptical galaxy. In those cases where photometric data are available, a best fit via the single parameter (M/L)_{stars} to the luminosity of the gaseous (HI plus He) and luminous stellar disks is obtained. Additionally, a best fit to the rotation curves of galaxies is obtained in terms of a parametric mass distribution (independent of luminosity observations) -- a two parameter fit to the total galactic mass, (or mass-to-light ratio M/L), and a core radius associated with a model of the galaxy cores using a nonlinear least-squares fitting routine including estimated errors. The fits are compared to those obtained using Milgrom's phenomenological MOND model and to the predictions of the Newtonian-Kepler acceleration law.

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