Discovery of Molecular Loop 3 in the Galactic Center: Evidence for a Positive-Velocity Magnetically Floated Loop towards $L=355^\circ-359^\circ$
Motosuji Fujishita, Kazufumi Torii, Natsuko Kudo, Tokuichi Kawase,, Hiroaki Yamamoto, Akiko Kawamura, Norikazu Mizuno, Toshikazu Onishi, Akira, Mizuno, Mami Machida, Kunio Takahashi, Satoshi Nozawa, Ryoji Matsumoto and, Yasuo Fukui

TL;DR
This paper reports the discovery of a new magnetically floated molecular loop, named 'loop 3', in the Galactic Center, providing evidence for magnetic instabilities influencing the nuclear gas disk's dynamics.
Contribution
It presents the first identification of loop 3, a molecular loop in the Galactic Center, expanding understanding of magnetic structures and their role in galactic gas dynamics.
Findings
Loop 3 has a size of ~600 pc and height of ~300 pc.
Total mass of loop 3 is estimated at ~3.0 x 10^6 solar masses.
Kinetic energy of loop 3 is approximately 1.7 x 10^52 ergs.
Abstract
We have discovered a molecular dome-like feature towards and . The large velocity dispersions of 50--100 km s of this feature are much larger than those in the Galactic disk and indicate that the feature is located in the Galactic center, probably within kpc of Sgr A. The distribution has a projected length of pc and height of pc from the Galactic disk and shows a large-scale monotonic velocity gradient of km s per pc. The feature is also associated with HI gas having a more continuous spatial and velocity distribution than that of CO. We interpret the feature as a magnetically floated loop similar to loops 1 and 2 and name it "loop 3". Loop 3 is similar to loops 1 and 2 in its height and length but is different from loops 1 and 2 in that the…
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