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

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 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 cloud, as also suggested by recent observations.

arXiv comment10 pages, 10 figures. To be published in MNRAS

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• Simulations of the Milky Way's central molecular zone -- I. Gas dynamics
• 3-D CMZ IV: Distinguishing Near vs. Far Distances in the Galactic Center Using Spitzer and Herschel
• Effects of turbulence in the Circumnuclear Disk
• Mass flows in the Galactic Center by supernovae of the circumnuclear disk