Constraining the dark side with observations

Details Constraining the dark side with observations Constraining the dark side with observations

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jphcs..66a2028d&link_type=abstract

Journal of Physics: Conference Series, Volume 66, Issue 1, pp. 012028 (2007).

Physics

Scientific paper

The main purpose of this talk is to use the observational evidences pointing out to the existence of a dark side in the universe in order to infer some of the properties of the unseen material. We will work within the Unified Dark Matter models, in which both, Dark Matter and Dark Energy appear as the result of one unknown component. By modeling effectively this component with a classical scalar field minimally coupled to gravity, we will use the observations to constrain the form of the dark action. Using the flat rotation curves of spiral galaxies we will see that we are restringed to the use of purely kinetic actions, previously studied in cosmology by Scherrer. Finally we arrive to a simple action which fits both cosmological and astrophysical observations.

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