Galaxy Rotation Curves without Nonbaryonic Dark Matter | Zendy

Joel R. Brownstein | Zendy; J. W. Moffat | Zendy

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Galaxy Rotation Curves without Nonbaryonic Dark Matter

Author(s) -

Joel R. Brownstein,

J. W. Moffat

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/498208

Subject(s) - physics , galaxy rotation curve , astrophysics , modified newtonian dynamics , dark matter , galaxy , surface brightness fluctuation , elliptical galaxy , fundamental plane (elliptical galaxies) , surface brightness , satellite galaxy , luminosity , astronomy , dark matter halo , brightest cluster galaxy , lenticular galaxy , galaxy formation and evolution , halo

We apply the modified acceleration law obtained from Einstein gravity coupledexplaining galaxy rotation curves without exotic dark matter. Our sample ofgalaxies includes low surface brightness (LSB) and high surface brightness(HSB) galaxies, and an elliptical galaxy. In those cases where photometric dataare available, a best fit via the single parameter (M/L)_{stars} to theluminosity of the gaseous (HI plus He) and luminous stellar disks is obtained.Additionally, a best fit to the rotation curves of galaxies is obtained interms of a parametric mass distribution (independent of luminosityobservations) -- a two parameter fit to the total galactic mass, (ormass-to-light ratio M/L), and a core radius associated with a model of thegalaxy cores using a nonlinear least-squares fitting routine includingestimated errors. The fits are compared to those obtained using Milgrom'sphenomenological MOND model and to the predictions of the Newtonian-Kepleracceleration law.Comment: 43 pages, 7 figures, 4 tables, 101 galaxies. Submitted to ApJ, June 20, 2005. Accepted for publication in ApJ, September 21, 2005. To be published in ApJ 636 (January 10, 2006

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