The RMS survey: Ammonia mapping of the environment of young massive stellar objects - II?
The RMS survey: Ammonia mapping of the environment of young massive stellar objects - II?
复制标题
RMS 巡天：年轻大质量恒星环境的氨图绘制 - II？
DOI：
10.1093/mnras/sty3053
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发表时间：
2019
影响因子：
4.8
通讯作者：
Billington S
中科院分区：
文献类型：
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作者：
Billington S
我们展示了红色 MSX 源 (RMS) 调查确定的 34 个区域的 NH3 绘图观测结果。我们使用澳大利亚望远镜紧凑阵列以 10 角秒的分辨率和速度通道分辨率 0.4 km s−1 向嵌入式大质量恒星形成的位置绘制了氨 (1, 1) 和 (2, 2) 反演发射光谱。已使用来自 ATLASGAL 和 GLIMPSE 遗产调查的补充数据，以增进对这些区域的了解并估计环境的物理参数。这些场的典型质量为∼1000 M⊙，半径为∼0.15 pc，距离为∼3.5 kpc。光度范围在∼103和∼106L之间，动力学温度在10和40 K之间。我们将每个场分为两个子集之一，以便根据NH3发射、RMS源和ATLASGAL热尘埃发射的形态和相对位置，构建这些区域中大质量恒星形成的演化系统。 NH3 发射和 ATLASGAL 团块之间的形态差异被证明与这些区域中正在进行的大质量恒星形成的演化阶段相对应。通过纳入这些区域中已知的甲醇和水脉泽的位置，进一步完善了该研究，以深入了解可能的原恒星区域并触发恒星形成。
We present the results from NH3mapping observations towards 34 regions identified by the Red MSX Source (RMS) survey. We have used the Australia Telescope Compact Array to map ammonia (1, 1) and (2, 2) inversion emission spectra at a resolution of 10 arcsec with velocity channel resolution of 0.4 km s−1towards the positions of embedded massive star formation. Complementary data have been used from the ATLASGAL and GLIMPSE Legacy Surveys in order to improve the understanding of the regions and to estimate physical parameters for the environments. The fields have typical masses of ∼1000 M⊙, radii of ∼0.15 pc, and distances of ∼3.5 kpc. Luminosities range between ∼103and ∼106L⊙and kinetic temperatures between 10 and 40 K. We classify each field into one of two subsets in order to construct an evolutionary system for massive star formation in these regions based on the morphology and relative positions of the NH3emission, RMS sources, and ATLASGAL thermal dust emission. Differences in morphology between NH3emission and ATLASGAL clumps are shown to correspond to evolutionary stages of ongoing massive star formation in these regions. The study has been further refined by including the positions of known methanol and water masers in the regions to gain insight into possible protostellar regions and triggered star formation.