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CHIMPS2: Survey description and \(^{12}\)CO emission in the Galactic Centre

Eden, D. J., Moore, T. J. T., Currie, M. J., Rigby, A. J., Rosolowsky, E., Su, Y., Kee-Tae Kim, K. T. K., Parsons, H., Morata, O., Chen, H. R., and others. (2020) CHIMPS2: Survey description and \(^{12}\)CO emission in the Galactic Centre. Monthly Notices of the Royal Astronomical Society, 498 (4). pp. 5936-5951. ISSN 0035-8711. E-ISSN 1365-2966. (doi:10.1093/mnras/staa2734) (KAR id:82814)


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 \(^{12}\)CO, \(^{13}\)CO, and C\(^{18}\)O (J = 3 → 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 \(^{12}\)CO J = 3→2 and cover −3◦ ≤ \(\ell\) ≤ 5 ◦and |b|≤ 0.◦5 with angular resolution of 15 arcsec, velocity resolution of 1 km s\(^{−1}\), and rms ∆T\(^∗_A\) = 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.

Item Type: Article
DOI/Identification number: 10.1093/mnras/staa2734
Uncontrolled keywords: molecular data – surveys – stars: formation – ISM: molecules – Galaxy centre
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Paul Crame
Date Deposited: 08 Sep 2020 13:58 UTC
Last Modified: 10 Dec 2022 04:51 UTC
Resource URI: (The current URI for this page, for reference purposes)

University of Kent Author Information

Urquhart, J.S..

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Billington, S. J..

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Campbell-White, J..

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