文章基本信息

标题：Distances to molecular clouds at high galactic latitudes based on Gaia DR2
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作者：Qing-Zeng Yan ; Bo Zhang ; Ye Xu 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：624
DOI：10.1051/0004-6361/201834337
语种：English
出版社：EDP Sciences
摘要：We report the distances of molecular clouds at high Galactic latitudes (|b| > 10°) derived from parallax andG-band extinction (AG) measurements in the secondGaiadata release,GaiaDR2. Aided by Bayesian analyses, we determined distances by identifying the breakpoint in the extinctionAGtoward molecular clouds and using the extinctionAGofGaiastars around molecular clouds to confirm the breakpoint. We used nearby star-forming regions, such as Orion, Taurus, Cepheus, and Perseus, whose distances are well known to examine the reliability of our method. By comparing with previous results, we found that the molecular cloud distances derived from this method are reliable. The systematic error in the distances is approximately 5%. In total, 52 molecular clouds have well-determined distances, most of which are at high Galactic latitudes, and we provide reliable distances for 13 molecular clouds for the first time.
关键词：Key wordsendust, extinctionISM: clouds