... FAQ Key Publications Links . ... Combined with previous data from our High-z Supernova Search Team and recent results by Riess et al., this expanded set of 16 high-redshift supernovae and a set of 34 nearby supernovae are used to place constraints on the following cosmological parameters: the Hubble constant (H 0 ), the mass density ( M ), the cosmological constant (i.e., the vacuum energy density, ), the deceleration parameter (q 0 ), and the dynamical age of the universe (t 0 ). ...