论文标题
与H II区域/候选物相关的分子云之间
The Molecular Clouds associated with the H II Regions/Candidates between $l=207.7^\circ$ and $l=211.7^\circ$
论文作者
论文摘要
使用中国德林哈的PMO-13.7 m毫米望远镜，我们对$^{12} $ CO，$^{13} $ co进行了大规模同时调查$ 4.0^\ circ \ times 4.5^\ circ $。该地区的大部分排放量来自云层，速度在$ -3 km S $^{ - 1} $到55 km S $^{ - 1} $的范围内，从0.5 kpc到7.0 kpc。该区域的分子云集中在三个速度范围内。确定了与十h II区域/候选物相关的分子云，并提出了它们的物理特性。在SH2-280，SH2-282，SH2-283和BFS54中发现了巨大的恒星，我们建议它们是H II区域的候选激发源。激发温度和线宽度的分布与H II区域/候选者中心的投影距离的分布表明，十h II区域/候选物及其相关的分子气体中的大多数是三维结构，而不是二维结构。
Using the PMO-13.7 m millimeter telescope at Delingha in China, we have conducted a large-scale simultaneous survey of $^{12}$CO, $^{13}$CO, and C$^{18}$O $J=1-0$ emission toward the sky region centered at $l$=$209.7^\circ$, $b$=$-$2.25$^\circ$ with a coverage of $4.0^\circ \times 4.5^\circ$. The majority of the emission in the region comes from the clouds with velocities lying in the range from $-$3 km s$^{-1}$ to 55 km s$^{-1}$, at kinematic distances from 0.5 kpc to 7.0 kpc. The molecular clouds in the region are concentrated into three velocity ranges. The molecular clouds associated with the ten H II regions/candidates are identified and their physical properties are presented. Massive stars are found within Sh2-280, Sh2-282, Sh2-283, and BFS54, and we suggest them to be the candidate excitation sources of the H II regions. The distributions of excitation temperature and line width with the projected distance from the center of H II region/candidate suggest that the majority of the ten H II regions/candidates and their associated molecular gas are three-dimensional structures, rather than two-dimensional structures.
