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- W2564697644 abstract "This paper reports the discovery of evidence for physical contact between the Galactic circumnuclear disk (CND) and an exterior giant molecular cloud. The central 10 pc of our Galaxy has been imaged in the HCN J = 1–0, HCO+ J = 1–0, CS J = 2–1, H13CN J = 1–0, SiO J = 2–1, SO NJ = 23–12, and HC3N J = 11–10 lines using the Nobeyama Radio Observatory 45 m radio telescope. Based on our examination of the position–velocity maps of several high-density probe lines, we have found that an emission bridge may be connecting the +20 km s−1 cloud (M–0.13–0.08) and the negative-longitude extension of the CND. Analyses of line intensity ratios imply that the chemical property of the bridge is located between the +20 km s−1 cloud and the CND. We introduce a new interpretation that a part of the CND may be colliding with the 20 km s−1 cloud and the collision may be responsible for the formation of the bridge. Such collisional events could promote mass accretion onto the CND or into the inner ionized cavity, which may be further tested by proper motion studies." @default.
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- W2564697644 date "2017-01-09" @default.
- W2564697644 modified "2023-10-18" @default.
- W2564697644 title "PHYSICAL CONTACT BETWEEN THE +20 km s<sup>−1</sup>CLOUD AND THE GALACTIC CIRCUMNUCLEAR DISK" @default.
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- W2564697644 doi "https://doi.org/10.3847/1538-4357/834/2/121" @default.
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