In the past years a wealth of observations has allowed us to unravel the structural properties of the Dark and Luminous mass distribution in spirals. As result, it has been found that their rotation curves follow, out their virial radius, an Universal function (URC) made by two terms: one due to the gravitational potential of a Freeman stellar disk and the other due to that of a dark halo. The importance of the latter is found to decrease with galaxy mass. Individual objects reveal in detail that dark halos have a density core, whose size correlates with its central value. These properties will guide CDM Cosmology to evolve to match the challenge that observations presently pose. © 2008 International Astronomical Union.
|Titolo:||The mass distribution in Spiral galaxies|
|Titolo del libro:||Dark Galaxies and Lost Baryons|
|Nome editore:||Cambridge University Press|
|Data di pubblicazione:||2007|
|Digital Object Identifier (DOI):||10.1017/S174392130701383X|
|Appare nelle tipologie:||4.1 Contribution in Conference proceedings|