Back to Volume
Paper: Observing the Dark Matter Density Profiles of Isolated Galaxies from SDSS Satellite Dynamics
Volume: 327, Satellites and Tidal Streams
Page: 14
Authors: Prada, F.; Vitvitska, M.; Klypin, A.; Holtzman, J.; Schlegel, D.; Grebel, E.K.; Rix, H.-W.; Brinkmann, J.; McKay, T.A.; Csabai, I.
Abstract: Velocities of satellites of galaxies together with weak lensing provide the best way to probe the mass distribution of individual field galaxies at large radii. Using the Sloan Digital Sky Survey, we find that the velocity dispersion of satellites declines with distance to the host galaxy. This decline agrees remarkably well with the distribution of dark matter predicted by the cosmological models in the peripheral parts of galaxies. A relation between the satellite velocity dispersion with the host luminosity, as well as an estimation of the host mass-to-light, is also given.
Back to Volume