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A Study of the Physical Properties and Star Formation Activity of a Large Sample of Molecular Clouds. I. Distances

  • Authors: Juan Mei, Min Fang, Miaomiao Zhang, Qing-Zeng Yan, Lixia Yuan, Xuepeng Chen, Zhiwei Chen, Yang Su, Shiyu Zhang, Zhibo Jiang, Ji Yang

Juan Mei et al 2026 The Astrophysical Journal Supplement Series 284 .

  • Provider: AAS Journals

Caption: Figure 12.

The lb distribution of molecular clouds cataloged in this work. The background is the integrated-intensity map of 12CO emission. Colored contours outline the boundaries of the clouds identified in this study, where the color scale indicates the distance to each cloud. The top, middle, and bottom panels show clouds in the Galactic longitude ranges of 9﹩\mathop{.}\limits^{\unicode{x000b0}}﹩75–90°, 80°–160°, and 150°–229﹩\mathop{.}\limits^{\unicode{x000b0}}﹩75, respectively. For comparison, previously cataloged clouds from T. S. Rice et al. (2016) and M.-A. Miville-Deschênes et al. (2017) (both based on kinematic distances) are overplotted as circles and squares, respectively, with ellipses representing their angular sizes and position angles. For these comparison catalogs, clouds with kinematic distances ≤3 kpc are shown in color following the same distance scale as the cloud contours, while those with kinematic distances >3 kpc are shown in white.

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