论文标题
第二个银河象限中的分子云的距离
Distances to molecular clouds in the second Galactic quadrant
论文作者
论文摘要
我们在第二个银河象限（$ 104.75^\ circ <l <l <150.25^\ circ $ and $ | b | b | <5.25^\ circ $）中介绍了76个中型分子云和一个大规模的大规模大规模（$ 104.75^\ circ <l <l <l <l <l <l <l <l <l <150.25^\ circ $），其中73个是第一次准确测量的。分子云样品是从$ l $ - $ b $ - $ v $ space（$ -95 <v _ {\ rm lsr} <25 $ \ kms）的，具有基于密度的使用噪声（dbscan）算法的高度空间聚类（使用差异），并使用远距离的差异来测量Extincrinctiond dr2 and extrinctinct and bepparallax（beepparax）。测得的距离至76个分子云的范围为211至2631 PC，大规模的分子云似乎是一个在大约40°（$ \ sim $ 700 pc）中的相干结构。
We present distances to 76 medium-sized molecular clouds and an extra large-scale one in the second Galactic quadrant ($104.75^\circ <l<150.25^\circ $ and $|b|<5.25^\circ$), 73 of which are accurately measured for the first time. Molecular cloud samples are drawn from $l$-$b$-$V$ space ($-95 < V_{\rm LSR}< 25$ \kms) with the density-based spatial clustering of applications with noise (DBSCAN) algorithm, and distances are measured with the background-eliminated extinction-parallax (BEEP) method using extinctions and Gaia DR2 parallaxes. The range of measured distances to 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° ($\sim$700 pc) in the Galactic longitude.
