Volume 645, January 2021
|Number of page(s)||10|
|Section||Interstellar and circumstellar matter|
|Published online||29 January 2021|
Distances to molecular clouds in the second Galactic quadrant
Purple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences,
10 Yuanhua Road,
e-mail: email@example.com; firstname.lastname@example.org
Accepted: 16 December 2020
We present distances to 76 medium-sized molecular clouds and an extra large-scale molecular cloud in the second Galactic quadrant (104. °75 < l < 150. °25 and |b| < 5. °25), 73 of which are accurately measured for the first time. Molecular cloud samples are drawn from l-b-V space (− 95 < VLSR < 25 km s−1) with the density-based spatial clustering of applications with noise algorithm, and distances are measured with the background-eliminated extinction-parallax method using extinctions and Gaia DR2 parallaxes. The range of the measured distances to the 76 molecular clouds is from 211 to 2631 pc, and the extra large-scale molecular cloud appears to be a coherent structure at about 1 kpc, across about 40° (~700 pc) in the Galactic longitude.
Key words: local insterstellar matter / dust, extinction / ISM: clouds / catalogs
© ESO 2021
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