Constraining scalar-tensor quintessence by cosmic clocks

Details Constraining scalar-tensor quintessence by cosmic clocks Constraining scalar-tensor quintessence by cosmic clocks

2007-06-18

arxiv.org/abs/0706.2615v1

Astronomy and Astrophysics

Astrophysics

13 pages, 8 figures. to be published in Astron & Astroph

Scientific paper

10.1051/0004-6361:20077827

Scalar-tensor quintessence models can be constrained by identifying suitable cosmic clocks which allow to select confidence regions for cosmological parameters. In particular, we constrain the characterizing parameters of non-minimally coupled scalar-tensor cosmological models which admit exact solutions of the Einstein field equations. Lookback time to galaxy clusters at low intermediate, and high redshifts is considered. The high redshift time-scale problem is also discussed in order to select other cosmic clocks such as quasars.

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