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A common origin for the circumnuclear disc and the nearby molecular clouds in the Galactic Centre

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The origin of the molecular clouds orbiting SgrA* is one of the most debated questions about our Galactic Centre. Here, we present the hydrodynamic simulation of a molecular cloud infalling… Click to show full abstract

The origin of the molecular clouds orbiting SgrA* is one of the most debated questions about our Galactic Centre. Here, we present the hydrodynamic simulation of a molecular cloud infalling towards SgrA*, performed with the adaptive-mesh-refinement code ramses. Through such simulation, we propose that the circumnuclear disc and the +20 km s−1 cloud originated from the same tidal disruption episode, occurred less than 1 Myr ago. We also show that recent star formation is to be expected in the +20 km s−1 cloud, as also suggested by recent observations.

Keywords: common origin; molecular clouds; circumnuclear disc; galactic centre

Journal Title: Monthly Notices of the Royal Astronomical Society
Year Published: 2019

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