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CONSTRAINS ON THE QUINTESSENCE FROM OBSERVATIONAL DATA

A. M. Badescu ; Cathy Horellou (Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik)
Romanian Reports in Physics (1221-1451). Vol. 63 (2011), 3, p. 852-861.
[Artikel, refereegranskad vetenskaplig]

We investigated a flat Universe where the quintessence has been approximated by the first order Chebyshev polynomials. We used different cosmological measurements: angular diameter, luminosity distance and the Hubble parameter to constrain it. The first two types of measurements favor a time dependent quintessence with a value of the quintessence at the present epoch higher than in the cosmological constant case. Hubble parameter measurements support a Universe close to the one given by the cosmological constant case.

Nyckelord: ia supernovae



Denna post skapades 2011-09-15. Senast ändrad 2014-09-02.
CPL Pubid: 146229

 

Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik (2010-2017)

Ämnesområden

Astronomi, astrofysik och kosmologi

Chalmers infrastruktur