Cosmological constraints in Λ-CDM and quintessence paradigms with Archeops

Abstract We review the cosmological constraints put by the current CMB experiment including the recent Archeops data, in the framework of Λ -CDM and quintessence paradigm. We show that well chosen combinations of constraints from different cosmological observations lead to precise measurements of cosmological parameters. The Universe seems flat with a 70% contribution of dark energy with an equation of state very close to those of the vacuum.