Tidally-disrupted Molecular Clouds falling to the Galactic Center

Abstract

We found a molecular cloud connecting from the outer region to the "Galactic Center Mini-spiral (GCMS)" which is a bundle of the ionized gas streams adjacent to Sgr A*. The molecular cloud has a filamentary appearance which is prominent in the CS J=2-1 emission line and is continuously connected with the GCMS. The velocity of the molecular cloud is also continuously connected with that of the ionized gas in the GCMS observed in the H42alpha recombination line. The morphological and kinematic relations suggest that the molecular cloud is falling from the outer region to the vicinity of Sgr A*, being disrupted by the tidal shear of Sgr A* and ionized by UV emission from the Central Cluster. We also found the SiO J=2-1 emission in the boundary area between the filamentary molecular cloud and the GCMS. There seems to exist shocked gas in the boundary area.

arXiv comment4 pages, 1 figure, Proceedings of IAU Symposium 322 (The Multi-Messenger Astrophysics of the Galactic Centre)

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Cited by in corpus (2)

• Monitoring dusty sources in the vicinity of Sgr A*
• ALMA and VLA Observations: Evidence for Ongoing Low-mass Star Formation near Sgr A*