University of Virginia, College and Graduate School of Arts and Sciences

UVa Astronomers Track Distant Star Cluster with Adaptive Optics

May 11, 2017

Research Associate Tobias Fritz, along with graduate students Sean Linden and Paul Zivick in Nitya Kallivayalil’s Near-field Cosmology group, combined images from Gemini South’s wide-field adaptive optics system with data from the Hubble Space Telescope to determine the proper motion of a distant cluster of stars. The observations, the first to use ground-based adaptive optics to precisely measure the motion of a cluster at such a large distance, allowed astronomers to set a lower limit for the mass of our Milky Way while providing clues about the cluster’s origin.

Read the Gemini press release for more details.