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About

Donald M. Arnold is a leading astrophysicist specializing in high-speed optical polarimetry and the development of next-generation robotic telescopes. His primary research focuses on gamma-ray bursts (GRBs)—the most violent explosions in the universe—where he uses polarization measurements to probe the magnetic fields and relativistic jets of these cataclysmic events. Arnold’s most notable contribution is the design and construction of the RINGO series of polarimeters, including RINGO3 (2012, 52 citations), which enabled the first multi-colour, fast-response polarization observations of GRB afterglows. This work has been pivotal in understanding synchrotron emission from rapidly moving electrons in GRB jets. Beyond polarimetry, Arnold is a key figure in the New Robotic Telescope (NRT) project, a 4-meter fully robotic telescope at La Palma, Spain, which will be the largest of its kind upon completion. His work on the NRT (2019, 2021) aims to revolutionize time-domain astronomy by providing rapid, automated follow-up of transient events. With a career bridging cutting-edge instrumentation and explosive astrophysics, Arnold’s impact is felt across transient astronomy and high-energy phenomena.