Molecular gas toward the Gemini OB1 Giant Molecular Cloud Complex I: Observation data

Abstract

We present a large-scale mapping toward the GEM OB1 association in the galactic anti-center direction. The 9^deg * 6.5^deg area was mapped in 12CO, 13CO, and C18O with 50" angular resolution at 30" sampling. The region was divided into four main components based on spatial distribution and velocity: the Gemini OB1 Giant Molecular Cloud (GGMC) Complex, the Lynds Dark Clouds and the West Front Clouds, the Swallow and Horn, and the Remote Clouds. The GGMC Complex is located in the Perseus arm, while the Lynds Dark Clouds and the West Front Clouds are located in the Local arm. Swallow and Horn are revealed for the first time in this paper. The two clouds have a similar velocity interval ([11, 21] km s^-1) and have similar sizes (0.6 and 0.8 deg^2). We analyzed the structure of these clouds in detail and calculated their parameters (mass, temperature, etc.). Two elongated structures were discovered in a longitude-velocity map in the velocity interval [11, 30] km s^-1. We also found an interesting filament that shows a 0.8 km s^-1 pc^-1 gradient perpendicular to the direction of the long axis.

51 pages, 23 figures. Accepted by ApJS

References in corpus (14)

• Theory of Star Formation
• The Milky Way in Molecular Clouds: A New Complete CO Survey
• Physical Conditions in Regions of Star Formation
• The Distance to the Perseus Spiral Arm in the Milky Way
• Trigonometric Parallaxes of Massive Star Forming Regions: I. S 252 & G232.6+1.0
• Trigonometric Parallaxes of 6.7 GHz Methanol Masers
• Giant Molecular Filaments in the Milky Way
• Chemistry and Dynamics in Pre-Protostellar Cores
• A CGPS Look at the Spiral Structure of the Outer Milky Way I: Distances and Velocities to Star Forming Regions
• Young stellar population and ongoing star formation in the HII complex Sh2-252
• Astrometry of H${}_2$O masers in the massive star--forming region IRAS 06061+2151 with VERA
• A Study of starless dark cloud LDN 1570: Distance, Dust properties and Magnetic field geometry
• Optical and Near-infrared survey of the stellar contents associated with the star-forming Complex Sh2-252
• Uniform detection of the pre-main sequence population in the 5 embedded clusters related to the H\,II region NGC\,2174 (Sh2-252)

Cited by in corpus (7)

• The Milky Way Imaging Scroll Painting (MWISP): Project Details and Initial Results from the Galactic Longitude of 25.8deg to 49.7deg
• Molecular cloud distances based on the MWISP CO survey and Gaia DR2
• Local Molecular Gas toward the Aquila Rift Region
• Molecular Gas Toward the Gemini OB1 Molecular Cloud Complex II: CO Outflow Candidates with Possible WISE Associations
• High energy gamma-ray emission powered by a young protostar: the case of S255 NIRS 3
• Ammonia mapping observations toward the Galactic massive star-forming region Sh 2-255 and Sh 2-257
• CO Outflow Candidates Toward the W3/4/5 Complex II: Feedback from Candidate Outflows