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PMO OpenIR  > 太阳活动的多波段观测研究团组  > 期刊论文
题名: THE DISK-OUTFLOW SYSTEM IN THE S255IR AREA OF HIGH-MASS STAR FORMATION
作者: Zinchenko, I.1, 2; Liu, S. -Y.3; Su, Y. -N.3; Salii, S. V.4; Sobolev, A. M.4; Zemlyanukha, P.1, 2; Beuther, H.5; Ojha, D. K.6; Samal, M. R.7, 8; Wang Ying(王英)9, 10
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-09-01
卷号: 810, 期号:1, 页码:10
关键词: astrochemistry ; HII regions ; instrumentation: interferometers ; ISM: clouds ; ISM: molecules ; stars: formation
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/810/1/10
文章类型: Article
英文摘要: We report the results of our observations of the S255IR area with the Submillimeter Array (SMA) at 1.3 mm in the very extended configuration and at 0.8 mm in the compact configuration as well as with the IRAM 30 m at 0.8 mm. The best achieved angular resolution is about 0.4 arcsec. The dust continuum emission and several tens of molecular spectral lines are observed. The majority of the lines is detected only toward the S255IR-SMA1 clump, which represents a rotating structure (probably a disk) around the young massive star. The achieved angular resolution is still insufficient to make any conclusions about the Keplerian or non-Keplerian character of the rotation. The temperature of the molecular gas reaches 130-180 K. The size of the clump is about 500 AU. The clump is strongly fragmented as follows from the low beam-filling factor. The mass of the hot gas is significantly lower than the mass of the central star. A strong DCN emission near the center of the hot core most probably indicates a presence of a relatively cold (less than or similar to 80 K) and rather massive clump there. High-velocity emission is observed in the CO line as well as in lines of high-density tracers HCN, HCO+, CS and other molecules. The outflow morphology obtained from a combination of the SMA and IRAM 30 m data is significantly different from that derived from the SMA data alone. The CO emission detected with the SMA traces only one boundary of the outflow. The outflow is most probably driven by jet bow shocks created by episodic ejections from the center. We detected a dense high velocity clump associated apparently with one of the bow shocks. The outflow strongly affects the chemical composition of the surrounding medium.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: YOUNG STELLAR OBJECTS ; MOLECULAR-SPECTROSCOPY ; COLOGNE DATABASE ; METHANOL MASERS ; DENSE CORES ; REGIONS ; SPECTRA ; COMPLEX ; JET ; MILLIMETER
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000361800900010
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14913
Appears in Collections:太阳活动的多波段观测研究团组_期刊论文

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作者单位: 1.Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia
2.Lobachevsky State Univ Nizhni Novgorod, Nizhnii Novgorod 603950, Russia
3.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan
4.Ural Fed Univ, Ekaterinburg, Russia
5.Max Planck Inst Astron, D-69117 Heidelberg, Germany
6.Tata Inst Fundamental Res, Dept Astron & Astrophys, Infrared Astron Grp, Bombay 400005, Maharashtra, India
7.CNRS, Lab Astrophys Marseille, UMR 6110, F-13388 Marseille 13, France
8.Univ Provence, F-13388 Marseille 13, France
9.Univ Geneva, Dept Astron, CH-1211 Geneva 4, Switzerland
10.Chinese Acad Sci, Purple Mt Observ, Beijing, Peoples R China
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