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...