Vol 26, No 9

Distances to Molecular Clouds in the Galactic Longitude l = 10°–20° from the MWISP 12CO 1–0 Survey

Juan Mei (梅娟), Zhiwei Chen (陈志维), Min Fang (房敏), Miaomiao Zhang (张淼淼), Shiyu Zhang (张世瑜) and Zhibo Jiang (江治波)

Abstract

We present distances to 56 molecular clouds within 10° ≤ l ≤ 20° and ∣b∣ ≤ 5.°25 from the Milky Way Imaging Scroll Painting (MWISP) 12CO survey, 47 of which are first-time determinations. The molecular clouds were identified using the DBSCAN algorithm, and their distances were measured with the MCCD method using J − Ks colors and the distances provided by 2MASS and Gaia EDR3. The distances range from ∼275 pc to ∼2118 pc. We also derived the physical properties of molecular clouds and found a moderate correlation between the dust extinction and the 12CO integrated intensity.


Keywords

stars: distances – (ISM:) dust, extinction – ISM: clouds

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