Issue |
A&A
Volume 645, January 2021
|
|
---|---|---|
Article Number | A129 | |
Number of page(s) | 10 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361/202039768 | |
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,
Qixia District,
Nanjing 210033,
PR China
e-mail: jiyang@pmo.ac.cn; qzyan@pmo.ac.cn
Received:
27
October
2020
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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.