110–111 H2CO and H110α observations towards the giant HII region in cloud complex W43
110–111 H2CO and H110α observations towards the giant HII region in cloud complex W43
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DOI：
10.1088/1674-4527/11/1/003
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发表时间：
2011
影响因子：
1.8
通讯作者：
Gang Wu;J. Esimbek;Jianjun Zhou;X. Han
中科院分区：
文献类型：
--
作者：
Gang Wu;J. Esimbek;Jianjun Zhou;X. Han
在云复合体W43的巨型HⅡ区观测到了110-111甲醛(H_2CO)吸收线和H_(110)α射电复合线。观测是利用中国国家天文台乌鲁木齐天文台南山25m单盘进行的。观测到了一个约30‘×30’的区域，覆盖了W43的整个HII区。除中心10‘区外，其余7个点都是首次用H_2CO_(110-111)吸收观察到的。计算了H_2CO的柱密度，得到的H_2CO浓度等值线与红外图像有一定的差异。H_2CO和H_RRL呈现多种特征，表明其结构复杂。H_2CO的强度与H_(110)α的速度似乎呈线性相关，这说明中心的WR/OB团簇的影响范围可能比目前已知的要大得多，因为它的大小接近50pC。
The 110–111 formaldehyde (H2CO) absorption line and H110α radio recombination line (H RRL) are observed towards the giant HII region in cloud complex W43. The observations are obtained using the Nanshan 25 m single dish operated by Urumqi Observatory, National Astronomical Observatories of China. A region about 30′ × 30′ is observed, which covers the whole HII region in W43. Except for the central 10′ region, all the other seven points are first observed with the H2CO 110–111 absorption. The column density of the H2CO is calculated, and the H2CO density contours show some differences with the infrared image. Multiple features appear in the H2CO and H RRL which indicate complex structure. The intensities of the H2CO and the velocities of the H110α seem to present a linear correlation, which illustrates that the sphere of influence of the central WR/OB cluster may be much more extended than presently known, since the size is nearly 50 pc.