Full suite of the present day Cosmic Microwave background ( CMB ) data , when combined with weak prior information on the Hubble constant and the age of the Universe , or the Large-Scale structure , provides strong indication for a non-zero density of the vacuum-like dark energy in our universe .
This result independently supports the conclusions from Supernovae Ia ( SN1a ) data .
When the model parameter space is extended to allow for the range of the equation of state parameter w _ { Q } for the dynamical field Q which gives rise to dark energy , the CMB data is found to give a weak upper bound w _ { Q } < -0.4 at 95 \% CL , however combined with SN1a data it strongly favours w _ { Q } < -0.8 , consistent with \Lambda -term like behaviour .