Scalar field with general kinetic term: fitting the SN Ia observational data

Details Scalar field with general kinetic term: fitting the SN Ia observational data Scalar field with general kinetic term: fitting the SN Ia observational data

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ysc..conf...46i&link_type=abstract

12th Young Scientists' Conference on Astronomy and Space Physics, held in Kyiv, Ukraine, April 19-23, 2005, Eds.: Simon, A.; Gol

Physics

Space Physics

Scientific paper

Cosmological scalar field (quintessence) is one of the most attractive models of the dark energy which causes the deceleration of the Universe expansion. We consider a scalar field with power-law kinetic term and investigate the best fit to observational data. In particular, we found the best fit value for exponent n in the power law in the case of constant potential. For our investigations we used the latest SN Ia data release obtained by SCP, HST [1]. We have studied the degrees of freedom in case of general kinetic and potential terms in the scalar field Lagrangian.

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