Using the radial velocity technique pioneered by Geoffrey Marcy and Paul Butler, the Lick Planet Search for substellar companions has thus far failed to find a brown dwarf or large Jupiter - or Saturn - mass object in a «torch» orbit around Beta Comae Berenices (Cumming et al, 1999). (solstation.com)
His research focuses on extrasolar planet searches and characterization. (project-eden.space)
This same combination was also used to find other super-Earths orbiting nearby stars in planet searches led by UH astronomer Andrew Howard and UC Berkeley Professor Geoffrey Marcy. (keckobservatory.org)