A compendium of distances to molecular clouds in the Star Formation Handbook
A compendium of distances to molecular clouds in the Star Formation Handbook
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DOI：
10.1051/0004-6361/201936145
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发表时间：
2020-01
影响因子：
6.5
通讯作者：
C. Zucker;J. Speagle;E. Schlafly;G. Green;D. Finkbeiner;A. Goodman;J. Alves
中科院分区：
文献类型：
--
作者：
C. Zucker;J. Speagle;E. Schlafly;G. Green;D. Finkbeiner;A. Goodman;J. Alves
到当地分子云的准确距离对于理解恒星和行星的形成过程至关重要，然而距离测量通常是在逐个云的基础上不均匀地获得的。我们最近开发了一种方法，在贝叶斯框架下将恒星光度数据与Gaia DR2视差测量相结合，以推断附近尘埃云的距离，典型的精度为∼5%。在改进了瞄准较低纬度的技术并纳入了南部银河系平面DECAM的深层光学数据后，我们得出了到雷普尔思分子云的距离目录(2008年，恒星形成手册，卷)。I和II)，它包含太阳附近的大部分分子物质。与脉泽视差测量得出的相同云的距离进行比较，结果表明，对于整个距离光谱(150PC≲2.5kpC)的云，我们的方法产生一致的距离，具有10%的散射度(−)。我们希望这一相同距离的目录将作为未来工作的基线。
Accurate distances to local molecular clouds are critical for understanding the star and planet formation process, yet distance measurements are often obtained inhomogeneously on a cloud-by-cloud basis. We have recently developed a method that combines stellar photometric data with Gaia DR2 parallax measurements in a Bayesian framework to infer the distances of nearby dust clouds to a typical accuracy of ∼5%. After refining the technique to target lower latitudes and incorporating deep optical data from DECam in the southern Galactic plane, we have derived a catalog of distances to molecular clouds in Reipurth (2008, Star Formation Handbook, Vols. I and II) which contains a large fraction of the molecular material in the solar neighborhood. Comparison with distances derived from maser parallax measurements towards the same clouds shows our method produces consistent distances with ≲10% scatter for clouds across our entire distance spectrum (150 pc−2.5 kpc). We hope this catalog of homogeneous distances will serve as a baseline for future work.