Quintessence Model and Cosmic Microwave Background

A particular kind of quintessence is considered, with equation of motion $p_Q\mathrm{/}{\rho }_Q=-1$, corresponding to a cosmological term with time-dependence $\mathrm{\Lambda }(t)=\mathrm{\Lambda }(t_0)(R(t_0)\mathrm{/}R(t){)}^P$ and we examine how values of ${\mathrm{\Omega }}_m$ and ${\mathrm{\Omega }}_{\mathrm{\Lambda }}$ depend on $P$.