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The Molecular Structures of Local Arm and Perseus Arm in the Galactic Region of l=[139.75,149.75]^circ, b=[-5.25,5.25]^circ

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arxiv 1702.00544 v2 pith:7MCLXLAA submitted 2017-02-02 astro-ph.GA astro-ph.SR

The Molecular Structures of Local Arm and Perseus Arm in the Galactic Region of l=[139.75,149.75]^circ, b=[-5.25,5.25]^circ

classification astro-ph.GA astro-ph.SR
keywords circmolecularstructureperseusregionatomicgalacticidentified
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Using the Purple Mountain Observatory Delingha (PMODLH) 13.7 m telescope, we report a 96-square-degree 12CO/13CO/C18O mapping observation toward the Galactic region of l = [139.75, 149.75]$^\circ$, b = [-5.25, 5.25]$^\circ$. The molecular structure of the Local Arm and Perseus Arm are presented. Combining HI data and part of the Outer Arm results, we obtain that the warp structure of both atomic and molecular gas is obvious, while the flare structure only exists in atomic gas in this observing region. In addition, five filamentary giant molecular clouds on the Perseus Arm are identified. Among them, four are newly identified. Their relations with the Milky Way large-scale structure are discussed.

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