论文标题
大规模的毫米波长氢无线电重组线围绕年轻大型星团
Large-scale Map of Millimeter-wavelength Hydrogen Radio Recombination Lines around a Young Massive Star Cluster
论文作者
论文摘要
我们报告了第一米的大尺度（长度为10 pc）发射的毫米波长氢重组线（MM-RRL）朝向W43-MAIN年轻大型星团（YMC）周围的巨型H II区域的图。我们的MM-RRL数据来自IRAM 30 m望远镜，并与来自Karl G. Jansky的无线电连续体和CM-RRL数据一起分析，非常大的阵列和HCO $^{+} $ 1-0的线排放数据来自IRAM 30 m。 MM-RRLS揭示了由WR/OB群集驱动的电子密度〜70-1500 cm $^{ - 3} $扩展的风电离气体壳，该$ 70-1500 cm $^{ - 3} $由WR/OB群集驱动，该量产生了总$α$α$光子的1.5 x 10 $^{50 $^{50 $^{50} $ S $ s $^{ - 1} $。该壳正在与W43-MAIN致密云中致密的中性分子气体相互作用。结合高光谱和角度分辨率的MM-RRL和CM-RRL立方体，我们得出了电离气体发射的动力学和压力扩展的二维相对分布，并发现RRL线形状由压力扩大（4-55 km S $ s $^{ - 1} $）（$ 4-55 km s $^{ - 1} $）（$ nmc和ymc brebishing of Dynamily brebisying of Dynamily Breninging）（8--1）km（8--1）外壳的边缘。在壳的边缘发现的超紧凑型H II区域的电离气体团块表明，大规模的电离气体运动触发了壳外围附近的新恒星产生的形成。
We report the first map of large-scale (10 pc in length) emission of millimeter-wavelength hydrogen recombination lines (mm-RRLs) toward the giant H II region around the W43-Main young massive star cluster (YMC). Our mm-RRL data come from the IRAM 30 m telescope and are analyzed together with radio continuum and cm-RRL data from the Karl G. Jansky Very Large Array and HCO$^{+}$ 1-0 line emission data from the IRAM 30 m. The mm-RRLs reveal an expanding wind-blown ionized gas shell with an electron density ~70-1500 cm$^{-3}$ driven by the WR/OB cluster, which produces a total Ly$α$ photon flux of 1.5 x 10$^{50}$ s$^{-1}$. This shell is interacting with the dense neutral molecular gas in the W43-Main dense cloud. Combining the high spectral and angular resolution mm-RRL and cm-RRL cubes, we derive the two-dimensional relative distributions of dynamical and pressure broadening of the ionized gas emission and find that the RRL line shapes are dominated by pressure broadening (4-55 km s$^{-1}$) near the YMC and by dynamical broadening (8-36 km s$^{-1}$) near the shell's edge. Ionized gas clumps hosting ultra-compact H II regions found at the edge of the shell suggest that large-scale ionized gas motion triggers the formation of new star generation near the periphery of the shell.
