CHIMPS2: survey description and 12CO emission in the Galactic Centre
David Eden, T. J. T. Moore, M. J. Currie, A. J. Rigby, Erik Rosolowsky, Yang Su, Kee‐Tae Kim, Harriet Parsons, Ó. Morata, H-R Chen, Tetsuhiro Minamidani, Geumsook Park, S. E. Ragan, J. S. Urquhart, Raffaele Rani, K. Tahani, S. J. Billington, Soumen Deb, C. Figura, T. Fujiyoshi, G. Joncas, Li-Wen Liao, Tie Liu, Hongjun Ma, P. Tuan-Anh, Hyeong-Sik Yun, Suinan Zhang, Ming Zhu, Jonathan D. Henshaw, Steven N. Longmore, Masato I. N. Kobayashi, M. A. Thompson, Yiping Ao, J. Campbell-White, T-C Ching, Eun Jung Chung, A. Duarte-Cabral, Michel Fich, Yu Gao, Sarah Graves, X-J Jiang, F. Kemper, Y-J Kuan, Woojin Kwon, Chang Won Lee, Jeong‐Eun Lee, Meizi Liu, Camilo Peñaloza, N. Peretto, Nguyễn Thị Phương, J. E. Pineda, R. Plume, Evaria Puspitaningrum, M. R. Samal, Archana Soam, Yan Sun, Xindi Tang, A. Traficante, G. J. White, C-H Yan, A. Y. Yang, Jinghua Yuan, Nannan Yue, Ashley Bemis, Christopher M. Brunt, Z. Chen, Jungyeon Cho, Paul C. Clark, C. J. Cyganowski, Per Friberg, G. A. Fuller, Ilseung Han, M. G. Hoare, Natsuko Izumi, H-J Kim, Jaeheon Kim, Shinyoung Kim, Eric W. Koch, Nario Kuno, K M Lacialle, S-P Lai, H. Lee, Y-H Lee, Di Li, S-Y Liu, Steve Mairs, Zhizheng Pan, Lei Qian, Peter Scicluna, C-S Shi, Hui Shi, S. Srinivasan, Q-H Tan, H. Thomas, Kazufumi Torii, Alfonso Trejo, Tomofumi Umemoto, Giulio Violino, S. H. J. Wallström, B. Wang
Abstract
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 12CO, 13CO, and C18O $(J = 3\rightarrow 2)$ 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 12CO J = 3 → 2 and cover ${-}3^{\circ }\, \le \, \ell \, \le \, 5^{\circ }$ and $\mid {b} \mid \, \le \, 0{_{.}^{\circ}} 5$ with angular resolution of 15 arcsec, velocity resolution of 1 km s−1, and rms $\Delta \, T_A ^\ast =$ 0.58 K at these resolutions. Such high-resolution observations of the CMZ will be a valuable data set for future studies, whilst complementing the existing Galactic Plane surveys, such as SEDIGISM, the ${Herschel}$ infrared Galactic Plane Survey, and ATLASGAL. In this paper, we discuss the survey plan, the current observations and data, as well as presenting position–position maps of the region. The position–velocity maps detect foreground spiral arms in both absorption and emission.