Black Hole 'Donuts' are Actually 'Fountains'
Overview of the press release
Based on computer simulations 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.
Figure 1: Artist’s impression of the gas motion around the supermassive black hole in the center of the Circinus Galaxy. The three gaseous components form the long-theorized “donut" structure: (1) a disk of infalling dense cold molecular gas, (2) outflowing hot atomic gas, and (3) gas returning to the disk.
Credit: ALMA (ESO/NAOJ/NRAO)
To read the full press release, please visit the ALMA (NAOJ) website.
Professor Kotaro Kohno (Institute of Astronomy, Graduate School of Science) participated in this research.
Journal Astrophysical Journal Title Circumnuclear Multiphase Gas in the Circinus Galaxy. II. The Molecular and Atomic Obscuring Structures Revealed with ALMA Authors Takuma Izumi, Keiichi Wada, Ryosuke Fukushige, Sota Hamamura, and Kotaro Kohno* DOI 10.3847/1538-4357/aae20b Paper link http://iopscience.iop.org/article/10.3847/1538-4357/aae20b
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