Star formation in Galactic spiral arms and the inter-arm regions

Abstract

The line of sight through the Galactic Plane between longitudes l = 37.83 degr and l = 42.50 degr allows for the separation of Galactic Ring Survey molecular clouds into those that fall within the spiral arms and those located in the inter-arm regions. By matching these clouds in both position and velocity with dense clumps detected in the mm continuum by the Bolocam Galactic Plane Survey, we are able to look for changes in the clump formation efficiency (CFE), the ratio of clump-to-cloud mass, with Galactic environment. We find no evidence of any difference in the CFE between the inter-arm and spiral-arm regions along this line of sight. This is further evidence that, outside the Galactic Centre region, the large-scale structures of the Galaxy play little part in changing the dense, potentially star-forming structures within molecular clouds.

Accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:1203.0295

References in corpus (11)

• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• The VLA Galactic Plane Survey
• Kinematic Distances to Molecular Clouds identified in the Galactic Ring Survey
• Resolution of the Distance Ambiguity for Galactic HII Regions
• The formation of molecular clouds in spiral galaxies
• Molecular clouds and clumps in the Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• There are no starless massive proto-clusters in the first quadrant of the Galaxy
• The star-forming content of the W3 giant molecular cloud
• An analysis of star formation with Herschel in the Hi-GAL Survey. I. The Science Demonstration Phase Fields
• Structural Variation of Molecular Gas in the Sagittarius Arm and Inter-Arm Regions
• Detection of Dense Molecular Gas in Inter-Arm Spurs in M51

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