The close circumstellar environment of Betelgeuse
The close circumstellar environment of Betelgeuse
We observed Betelgeuse using ALMA’s extended configuration in band 7 ( f ≈ 340 GHz, λ ≈ 0.88 mm), resulting in a very high angular resolution of 18 mas. Using a solid body rotation model of the 28 SiO(ν= 2, J = 8−7) line emission, we show that the supergiant …