论文标题
人口普查为163个大尺度（> = 10 pc），内银河流平面中的速度丝状细丝：物理特性，密集的气体分数以及与螺旋臂的关联
A census of 163 large-scale (>=10 pc), velocity-coherent filaments in inner Galactic plane: physical properties, dense gas fraction, and association with spiral arms
论文作者
论文摘要
星际介质具有高丝状和分层结构，这可能在恒星形成中起重要作用。一项针对其物理参数，分布，结构和运动学的大规模细丝的系统研究将告知我们哪种细丝有可能形成恒星的潜力，材料如何通过细丝喂养质体以及恒星形成与银河系螺旋臂之间的联系。与传统的“眼睛”搜索不同，我们使用定制的最小跨越树算法来识别细丝，通过将Apex Telescope的银河系大面积调查连接到Galaxy目录中。在内部银河平面（$ | l | <60^\ circ $）中，我们确定了163个具有物理特性的大规模细丝，包括密集的气体质量分数，并将它们与位置位置位置空间中更新的螺旋臂模型进行比较。发现密集的气体质量分数在各种银河系位置没有显着差异，在不同的螺旋臂中也没有显着差异。我们还发现，大多数细丝是添加距离限制后的臂间丝，并且手臂的细丝与不进来的细丝有所不同。令人惊讶的结果是，在相同大小的质量上，弹药和关闭细丝的质量没有显着区别。
The interstellar medium has a highly filamentary and hierarchical structure, which may play a significant role in star formation. A systematical study on the large-scale filaments towards their physical parameters, distribution, structures and kinematics will inform us of what kind of filaments have potential to form stars, how the material feed protostars through filaments, and the connection between star formation and Galactic spiral arms. Unlike the traditional "by eyes" searches, we use a customized minimum spanning tree algorithm to identify filaments by linking Galactic clumps from the APEX Telescope Large Area Survey of the Galaxy catalogue. In the inner Galactic plane ($|l| < 60^\circ$), we identify 163 large-scale filaments with physical properties derived, including dense gas mass fraction, and compare them with an updated spiral arm model in position-position-velocity space. Dense gas mass fraction is found not to differ significantly in various Galactic position, neither does it in different spiral arms. We also find that most filaments are inter-arm filaments after adding a distance constraint, and filaments in arm differ a little with those not in. One surprising result is that clumps on and off filaments have no significant distinction in their mass at the same size.
