Empirical velocity profiles for galactic rotation curves

Abstract

A unified parametrization of the circular velocity, which accurately fits 850 galaxy rotation curves without needing in advance the knowledge of the luminous matter components, nor a fixed dark matter halo model, is proposed. A notable feature is that the associated gravitational potential increases with the distance from the galaxy center, giving rise to a length scale indicating a finite size of a galaxy, and after, the Keplerian fall-off of the parametrized circular velocity is recovered according to Newtonian gravity, making possible the estimation of the total mass enclosed by the galaxy.

36 pages, 864 figures, Accepted for publishing in the Monthly Notices of the Royal Astronomical Society

References in corpus (8)

• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• High-resolution mass models of dwarf galaxies from LITTLE THINGS
• The rotation curves shapes of late-type dwarf galaxies
• High Resolution Optical Velocity Fields of 11 Low Surface Brightness Galaxies
• Dynamical signatures of a LCDM-halo and the distribution of the baryons in M33
• The Dark Matter Distribution in the Spiral $NGC3198$ out to 0.22 $R_{vir}$
• Ionized gas rotation curves in nearby dwarf galaxies
• The radial dependence of dark matter distribution in M33

Cited by in corpus (5)

• The universal rotation curve of low surface brightness galaxies IV: the interrelation between dark and luminous matter
• Navarro-Frenk-White dark matter profile and the dark halos around disk systems
• The Quest for the Nature of the Dark Matter: The Need of a New Paradigm
• Issues in the Investigations of the Dark Matter Phenomenon in Galaxies: Parcere Personis, Dicere de Vitiis
• Fundamental properties of the dark and the luminous matter from Low Surface Brightness discs