研究Sh2-112区域的形貌和CO气体运动学

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Kshitiz K. Mallick, Saurabh Sharma, Lokesh K. Dewangan, Devendra K. Ojha, Neelam Panwar, Tapas Baug
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引用次数: 1

摘要

利用CO同位素的3-2跃迁对Sh2-112大质量恒星形成区的分子云进行了研究:CO, \(^{13}\) CO和C \(^{18}\) O;部分由CGPS H线发射和MSX数据补充。Sh2-112是一个由O8V型大质量恒星BD \(+\) 45 3216提供动力的可见光区域,拥有两个红色MSX巡天源:G083.7962 \(+\) 03.3058和G083.7071 \(+\) 03.2817,分别被归类为H区和年轻恒星物体。来自詹姆斯·克拉克·麦克斯韦望远镜档案的简化光谱数据产品,集中在两个RMS物体上,每个物体的视场分别为\(\sim \)\(7'\times 7'\)。该区域的\(^{13}\) CO(3-2)通道图显示,分子云具有远离大质量恒星的丝状延伸,这似乎也在一个腔状结构的边缘。多个分子云突出到这个空腔结构中,宿主局部发射峰。仅从位置-位置-速度空间中检测到的5 \(\sigma \)级以上的发射团块构建的区域综合发射图也证实了这一点。发现MSX源沿空腔边界分布,气体在此被压缩。这些位置的光谱提取得到了高马赫数和低热压与非热压之比,表明在云中超音速和非热运动占主导地位。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating morphology and CO gas kinematics of Sh2-112 region

We present a study of the molecular cloud in Sh2-112 massive star forming region using the 3-2 transition of CO isotopologues: CO, \(^{13}\)CO and C\(^{18}\)O; supplemented in part by CGPS H i line emission and MSX data. Sh2-112 is an optically visible region powered by an O8V type massive star BD\(+\)45 3216, and hosts two Red MSX Survey sources: G083.7962\(+\)03.3058 and G083.7071\(+\)03.2817, classified as H ii region and young stellar object, respectively. Reduced spectral data products from the James Clerk Maxwell Telescope archive, centered on the two RMS objects with \(\sim \) \(7'\times 7'\) field-of-view each, were utilized for the purpose. The \(^{13}\)CO(3-2) channel map of the region shows the molecular cloud to have filamentary extensions directed away from the massive star, which also seems to be at the edge of a cavity like structure. Multiple molecular cloud protrusions into this cavity structure, host local peaks of emission. The integrated emission map of the region constructed from only those emission clumps, detected above 5\(\sigma \) level in the position–position–velocity space affirms the same. MSX sources were found distributed along the cavity boundary, where the gas has been compressed. Spectral extraction at these positions yielded high Mach numbers and low ratios of thermal to non-thermal pressures, suggesting a dominance of supersonic and non-thermal motion in the cloud.

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来源期刊
Journal of Astrophysics and Astronomy
Journal of Astrophysics and Astronomy 地学天文-天文与天体物理
CiteScore
1.80
自引率
9.10%
发文量
84
审稿时长
>12 weeks
期刊介绍: The journal publishes original research papers on all aspects of astrophysics and astronomy, including instrumentation, laboratory astrophysics, and cosmology. Critical reviews of topical fields are also published. Articles submitted as letters will be considered.
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