中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Submillimeter array observations of L1551 IRS 5 in CS J=7-6

文献类型:期刊论文

作者Takakuwa, S; Ohashi, N; Ho, PTP; Qi, CH; Wilner, DJ; Zhang, QH; Bourke, TL; Hirano, N; Choi, M; Yang, J
刊名ASTROPHYSICAL JOURNAL
出版日期2004-11-20
卷号616期号:1页码:L15-L18
ISSN号0004-637X
关键词ISM : individual (L1551 IRS 5) ISM : molecules planetary systems : protoplanetary disks stars : formation
英文摘要We have imaged the circumstellar envelope around the binary protostar L1551 IRS 5 in CS J = 7-6 and 343 GHz continuum emission at similar to3" resolution using the Submillimeter Array. The continuum emission shows an elongated structure (similar to22- x 100 AU) around the binary perpendicular to the axis of the associated radio jet. The CS emission extends over similar to400 AU, appears approximately circularly symmetric, and shows a velocity gradient from southeast (blueshifted) to northwest (redshifted). The direction of the velocity gradient is different from that observed in (CO)-O-18 J = 1-0. This may be because rotation is more dominant in the CS envelope than the (CO)-O-18 envelope, in which both infall and rotation exist. The CS emission can be divided into two velocity components: (1) a "high"- velocity disklike structure surrounding the protostar +/- 1.0-1.5 km s(-1) from the systemic velocity, and (2) a "low"-velocity structure located southwest of the protostar less than 1.0 km s(-1) from the systemic velocity. The high-velocity component traces warm and dense gas with kinematics consistent with rotation around the protostar. The low-velocity component may arise from dense gas entrained in the outflow. Alternatively, this component may trace infalling and rotating gas in an envelope with a vertical structure.
学科主题Astronomy & Astrophysics
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 ; DISK-LIKE ENVELOPE ; DETAILED STRUCTURE ; BINARY-SYSTEM ; GAS DISK ; L1551-IRS-5 ; CO ; PROTOSTAR ; OUTFLOW ; SHOCKS
收录类别SCI
语种英语
WOS记录号WOS:000225199800004
公开日期2012-12-22
源URL[http://libir.pmo.ac.cn/handle/332002/7693]  
专题紫金山天文台_分子云与恒星形成研究团组
作者单位1.Harvard Smithsonian Ctr Astrophys, Submillimeter Array Project, Hilo, HI 96720 USA
2.Acad Sinica, Inst Astron & Astrophys, Hilo, HI 96720 USA
3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
4.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan
5.Korea Astron Observ, Taeduk Radio Astron Observ, Taejon 305348, South Korea
6.Chinese Acad Sci, Purple Mt Observ, Nanjing 21008, Peoples R China
推荐引用方式
GB/T 7714
Takakuwa, S,Ohashi, N,Ho, PTP,et al. Submillimeter array observations of L1551 IRS 5 in CS J=7-6[J]. ASTROPHYSICAL JOURNAL,2004,616(1):L15-L18.
APA Takakuwa, S.,Ohashi, N.,Ho, PTP.,Qi, CH.,Wilner, DJ.,...&Yang, J.(2004).Submillimeter array observations of L1551 IRS 5 in CS J=7-6.ASTROPHYSICAL JOURNAL,616(1),L15-L18.
MLA Takakuwa, S,et al."Submillimeter array observations of L1551 IRS 5 in CS J=7-6".ASTROPHYSICAL JOURNAL 616.1(2004):L15-L18.

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。