Over a period of 6 years, activity on the red giant star XX Tri was observed using the STELLA robotic telescopes on Tenerife and a technique called Doppler imaging. Also known as Doppler tomography, its uses “clever mathematical methods and observing techniques to resolve stellar surfaces indirectly,” according to Leibniz Institute for Astrophysics Potsdam (AIP).
Credit: A. Künstler, T. A. Carroll, and K. G. Strassmeier, Leibniz Institute for Astrophysics Potsdam (AIP)
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