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题名: AMMONIA AND CO OUTFLOW AROUND 6.7 GHz METHANOL MASERS
作者: Li, F. C.; Xu, Y.; Wu, Y. W.; Yang, J.; Lu, D. R.; Menten, K. M.; Henkel, C.
刊名: ASTRONOMICAL JOURNAL
出版日期: 2016
卷号: 152, 期号:4, 页码:92
英文摘要: Single point observations are presented in NH3. (1, 1) and (2, 2) inversion transitions using the Effelsberg 100 m telescope for a sample of 100 6.7 GHz methanol masers and mapping observations in the (CO)-C-12 and (CO)-C-13 (1 - 0) transitions using the Purple Mountain Observatory Delingha 13.7 m telescope for 82 sample sources with detected ammonia. A further 62 sources were selected for either (CO)-C-12 or (CO)-C-13 line outflow identification, producing 45 outflow candidates, 29 using (CO)-C-12 and 16 using (CO)-C-13 data. Twenty-two of the outflow candidates were newly identified, and 23 had trigonometric parallax distances. Physical properties were derived from ammonia lines and CO outflow parameters were calculated. Histograms and statistical correlations for ammonia, CO outflow parameters, and 6.7 GHz methanol maser luminosities are also presented. No significant correlation was found between ammonia and maser luminosity. However, weak correlations were found between outflow properties and maser luminosities, which may indicate that outflows are physically associated with 6.7 GHz masers.
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16899
Appears in Collections:紫金山天文台青海观测站_期刊论文

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