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Close Encounter More Than 10,000 Years Ago Stirred Up Spirals in an Accretion Disk

Close Encounter More Than 10,000 Years Ago Stirred Up Spirals in an Accretion Disk

18 June, 2022

An international research team from China, the U.S., and Germany has used high-resolution observational data from ALMA and discovered a massive accretion disk with two spiral arms surrounding a 32 solar mass protostar in the Galactic Center. This disk could be perturbed by a close encounter with a flyby object, thus leading to the formation of the spiral arms. This...

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