Properties of the high-mass star forming region IRAS 22475+5939
文献类型：期刊论文
| 作者 | Liu, Xiao-Lan1,2 ; Wang, Jun-Jie1; Liu Xiaolan; Wang Junjie
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2012-07-01 |
| 卷号 | 12期号:7页码:845-856 |
| 关键词 | ISM: jets and outflow ISM: molecular ISM: kinematical and dynamics star formation |
| 英文摘要 | IRAS 22475+5939 has been well studied by previous astronomers, but we can still discover new characteristics about it, using the first observations of the lines from CO J=2-1, (CO)-C-13 J=2-1 and (CO)-C-13 J=3-2 by the KOSMA 3m telescope. The mapping of the intensity ratio of (CO)-C-13 J=3-2 and (CO)-C-13 J=2-1 shows that the distribution of the temperature has two peaks, neither of which coincide with the IRAS 22475+5939 source or the center of the HIT region, but rather are located at the edge of the HII region. Overlays of the Spitzer IRAC 8 mu m with CO contours indicate that they are associated with each other and that the strongest polycyclic aromatic hydrocarbon (PAH) emission is at the IRAS 22475+5939 source position. The IRAS LRS spectrum at 7 mu m similar to 23 mu m and the PHT-s spectrum at 2 mu m similar to 12 mu m of the IRAS 22475+5939 source also exhibit strong PAH emission characteristics in the main PAH bands. The diversity of the PAH family should be responsible for the plateaus in the PAH emission in the PHT-s and IRAS-LRS spectra. Analysis and modeling in the infrared bands suggest that IRAS 22475+5939 is more likely to be a class I young stellar object. Where this is the case, the star is likely to have a temperature of T-eff similar to 9995.8 K, mass similar to 15.34 M-circle dot, luminosity similar to 1.54 x 10(4) L-circle dot and age similar to 1.54 x 10(4) yr. The model shows that circumstellar disc emission is important for wavelengths between 1 and 10 mu m, otherwise, the envelope fluctuates for lambda > 10 mu m. Bipolar outflow is confirmed in the molecular cloud, and the excited star of the HII region could be the driving source of the outflow. High resolution is required for better results. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000306892600012 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6223]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiao-Lan,Wang, Jun-Jie,Liu Xiaolan,et al. Properties of the high-mass star forming region IRAS 22475+5939[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(7):845-856. |
| APA | Liu, Xiao-Lan,Wang, Jun-Jie,Liu Xiaolan,&Wang Junjie.(2012).Properties of the high-mass star forming region IRAS 22475+5939.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(7),845-856. |
| MLA | Liu, Xiao-Lan,et al."Properties of the high-mass star forming region IRAS 22475+5939".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.7(2012):845-856. |
入库方式： OAI收割
来源：国家天文台
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