Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

12CO (3–2) High-Resolution Survey (COHRS) of the Galactic Plane: Complete Data Release

Park, G, Currie, MJ, Thomas, HS, Rosolowsky, E, Dempsey, JT, Kim, KT, Rigby, AJ, Su, Y, Eden, DJ, Colombo, D, Parsons, H and Moore, TJT (2022) 12CO (3–2) High-Resolution Survey (COHRS) of the Galactic Plane: Complete Data Release. Astrophysical Journal, Supplement Series, 264 (1). ISSN 0067-0049

12CO (3–2) High-Resolution Survey (COHRS) of the Galactic Plane Complete Data Release.pdf - Published Version
Available under License Creative Commons Attribution.

Download (25MB) | Preview
Open Access URL: https://doi.org/10.3847/1538-4365/ac9b59 (Published version)


We present the full data release of the 12CO (3-2) High-Resolution Survey (COHRS), which has mapped the inner Galactic plane over the range of 9.°5 ≤ l ≤ 62.°3 and ∣b∣ ≤ 0.°5. COHRS has been carried out using the Heterodyne Array Receiver Program on the 15 m James Clerk Maxwell Telescope in Hawaii. The released data are smoothed to have a spatial resolution of 16.″6 and a velocity resolution of 0.635 km s−1, achieving a mean rms of ∼0.6 K on T A * . The COHRS data are useful for investigating detailed three-dimensional structures of individual molecular clouds and large-scale structures such as spiral arms in the Galactic plane. Furthermore, data from other available public surveys of different CO isotopologues and transitions with similar angular resolutions to this survey, such as FUGIN, SEDIGISM, and CHIMPS/CHIMPS2, allow studies of the physical properties of molecular clouds and comparison of their states. In this paper, we report further observations on the second release and improved data reduction since the original COHRS release. We discuss the characteristics of the COHRS data and present integrated-emission images and a position-velocity (PV) map of the region covered. The PV map shows a good match with spiral-arm traces from existing CO and H i surveys. We also obtain and compare integrated one-dimensional distributions of 12CO (1-0) and (3-2) and those of star-forming populations.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural); Astronomy & Astrophysics
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
SWORD Depositor: A Symplectic
Date Deposited: 16 Mar 2023 12:09
Last Modified: 16 Mar 2023 12:15
DOI or ID number: 10.3847/1538-4365/ac9b59
URI: https://researchonline.ljmu.ac.uk/id/eprint/19118
View Item View Item