CHIMPS2: Survey description and $^{12}$CO emission in the Galactic Centre
D. J. Eden, T.J.T. Moore, M.J. Currie, A.J. Rigby, E. Rosolowsky, Y., Su, Kee-Tae Kim, H. Parsons, O. Morata, H.-R. Chen, T. Minamidani, Geumsook, Park, S.E. Ragan, J.S. Urquhart, R. Rani, K. Tahani, S.J. Billington, S. Deb,, C. Figura, T. Fujiyoshi, G. Joncas, L.W. Liao, T. Liu

TL;DR
CHIMPS2 is a new high-resolution survey of the Inner Galaxy's molecular gas using $^{12}$CO, $^{13}$CO, and C$^{18}$O emissions, providing valuable data for understanding star formation and galactic environment effects.
Contribution
This paper introduces the first data release of CHIMPS2, a survey of the Inner Galaxy with high-resolution CO observations, complementing existing Galactic plane surveys.
Findings
Detection of foreground spiral arms in absorption and emission.
High-resolution maps of the Central Molecular Zone in $^{12}$CO J=3→2.
Coverage of $-3^ ext{o}$ to $5^ ext{o}$ in Galactic longitude.
Abstract
The latest generation of Galactic-plane surveys is enhancing our ability to study the effects of galactic environment upon the process of star formation. We present the first data from CO Heterodyne Inner Milky Way Plane Survey 2 (CHIMPS2). CHIMPS2 is a survey that will observe the Inner Galaxy, the Central Molecular Zone (CMZ), and a section of the Outer Galaxy in CO, CO, and CO emission with the Heterodyne Array Receiver Program on the James Clerk Maxwell Telescope (JCMT). The first CHIMPS2 data presented here are a first look towards the CMZ in CO J = 32 and cover and b with angular resolution of 15 arcsec, velocity resolution of 1 km s, and rms 0.58 K at these resolutions. Such high-resolution observations of the CMZ will be…
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