The interaction of young massive stars with their environment - A millimeter and submillimeter line study of NGC 6334 FIR II
文献类型：期刊论文
| 作者 | Zhang, J. S.; Henkel, C.; Mauersberger, R.; Chin, Y-N.; Menten, K. M.; Tieftrunk, A. R.; Belloche, A. |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2007-04-01 |
| 卷号 | 465期号:3页码:887-U85 |
| 关键词 | ISM : abundances ISM : atoms ISM : HII regions ISM : individual objects : NGC 6334 FIR II ISM : molecules radio lines : ISM |
| ISSN号 | 0004-6361 |
| 英文摘要 | Using the 15-m Swedish ESO Sub-millimeter Telescope (SEST), CO, HCN, and HCO+ observations of the galactic star-forming region NGC6334 FIRII are presented, complemented by [CI]P-3(1)-P-3(0) and P-3(2)-P-3(1) data from the Atacama Pathfinder Experiment (APEX 12-m telescope). Embedded in the extended molecular cloud and associated with the HII region NGC6334-D, there is a molecular "void". [CI] correlates well with (CO)-C-13 and other molecular lines and shows no rim brightening relative to molecular cloud regions farther off the void. While an interpretation in terms of a highly clumped cloud morphology is possible, with photon dominated regions (PDRs) reaching deep into the cloud, the data do not provide any direct evidence for a close association of [CI] with PDRs. Kinetic temperatures are similar to 40-50 K in the molecular cloud and greater than or similar to 200 K toward the void. CO and [CI] excitation temperatures are similar. A comparison of molecular and atomic fine structure line emission with the far infrared and radio continuum as well as the distribution of 2.2 mu m H-2 emission indicates that the well-evolved HII region expands into a medium that is homogeneous on pc-scales. If the H-2 emission is predominantly shock excited, both the expanding ionization front (classified as subsonic, "D-type") and the associated shock front farther out (traced by H-2) can be identified, observationally confirming for the first time a classical scenario that is predicted by evolutionary models of HII regions. Integrated line intensity ratios of the observed molecules are determined, implying a mean (CO)-O-18/(CO)-O-17 abundance ratio of 4.13 +/- 0.13 that reflects the O-18/O-17 isotope ratio. This ratio is consistent with values determined in nearby clouds. Right at the edge of the void, however, the oxygen isotope ratio might be smaller. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | OXYGEN ISOTOPIC-RATIOS ; NGC 6334 I ; DENSE GAS ; (CO)-O-18/(CO)-O-17 RATIO ; PHOTODISSOCIATION REGIONS ; INTERSTELLAR-MEDIUM ; MOLECULAR CLOUD ; NEARBY GALAXIES ; HII-REGIONS ; EMISSION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000245290400021 |
| 公开日期 | 2012-02-05 |
| 源URL | [http://159.226.72.40/handle/332002/2448]  |
| 专题 | 紫金山天文台_太阳和太阳系等离子体研究团组 |
| 作者单位 | 1.Max Planck Inst Radioastron, D-53121 Bonn, Germany 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China 4.IRAM, Granada 18012, Spain 5.Tamkang Univ, Dept Phys, Tamsui, Taiwan |
| 推荐引用方式 GB/T 7714 | Zhang, J. S.,Henkel, C.,Mauersberger, R.,et al. The interaction of young massive stars with their environment - A millimeter and submillimeter line study of NGC 6334 FIR II[J]. ASTRONOMY & ASTROPHYSICS,2007,465(3):887-U85. |
| APA | Zhang, J. S..,Henkel, C..,Mauersberger, R..,Chin, Y-N..,Menten, K. M..,...&Belloche, A..(2007).The interaction of young massive stars with their environment - A millimeter and submillimeter line study of NGC 6334 FIR II.ASTRONOMY & ASTROPHYSICS,465(3),887-U85. |
| MLA | Zhang, J. S.,et al."The interaction of young massive stars with their environment - A millimeter and submillimeter line study of NGC 6334 FIR II".ASTRONOMY & ASTROPHYSICS 465.3(2007):887-U85. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。