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astro-ph.SR2024
Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse
Morgan MacLeod, Sarah Blunt, Robert J. De Rosa +10
We examine a century of radial velocity, visual magnitude, and astrometric observations of the nearest red supergiant, Betelgeuse, in order to reexamine the century-old assertion t…
astro-ph.SR2023
The Great Dimming of Betelgeuse: the photosphere as revealed by tomography over the past 15 years
Daniel Jadlovský, Thomas Granzer, Michael Weber +6
Betelgeuse, a red supergiant star of semi-regular variability, reached a historical minimum brightness in February 2020, known as the Great Dimming. Even though the brightness has…