Based on computer simulations by "ATERUI" and new observations from the Atacama Large Millimeter/submillimeter Array (ALMA), researchers have found that the rings of gas surrounding active supermassive black holes are not simple donut shapes. Instead gas expelled from the center interacts with infalling gas to create a dynamic circulation pattern, similar to a water fountain in a city park. (November 30, 2018 press release)
See the full story: ALMA Project press release: "Black Hole 'Donuts' are Actually 'Fountains'"
[Computers used in this research]
In this research, the supercomputer "ATERUI" operated by CfCA were used for simulations of the motions and structures of gas around an AGN. "ATERUI" is NAOJ's 4th generation supercomputer dedicated for astronomical simulations. The theoretical peak performance is 1.058 Pflops. This system had been operated until March 2018. (Photo credit: NAOJ)
Title: "Circumnuclear Multiphase Gas in the Circinus Galaxy. II. The Molecular and Atomic Obscuring Structures Revealed with ALMA"
Journal: Astrophysical Journal
Authors: Takuma Izumi, Keiichi Wada, Ryosuke Fukushige, Sota Hamamura, and Kotaro Kohno
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