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A compendium of distances to molecular clouds in the Star Formation Handbook ? ??

机译:在星形形成手册中的分子云距离延迟 <相关对象对象型=“tablecds”source-id =“http: //cdsarc.u-strasbg.fr/viz-bin/cat/j/aada/633/a51“source-id-type =”url“/> ?? ??

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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.
机译:对局部分子云的准确距离对于了解明星和行星形成过程至关重要,但距离测量通常在逐云的基础上不均匀获得。我们最近开发了一种方法,将恒星光度数据与盖亚尔DR2视差测量结合在贝叶斯框架中,以推断附近尘云的距离〜5%的典型精度。在将技术精炼到占地面积下纬度并将深光学数据纳入南部银飞率中的焊料之后,我们已经衍生出Reipurth(2008,星形形成手册,Vols。I和II)中的分子云的距离目录太阳能邻域分子材料的分数。与朝向同一云的幻像视差测量距离的距离的比较显示我们的方法在整个距离频谱(150pc?2.5 kPc)上云的云散射一致的距离。我们希望这一目录的同质距离将作为未来工作的基准。

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