Submillimeter array observations of L1551 IRS 5 in CS J=7-6 | |
Takakuwa, S; Ohashi, N; Ho, PTP; Qi, CH; Wilner, DJ; Zhang, QH; Bourke, TL; Hirano, N; Choi, M; Yang, J | |
刊名 | ASTROPHYSICAL JOURNAL |
2004-11-20 | |
卷号 | 616期号:1页码:L15-L18 |
关键词 | ISM : individual (L1551 IRS 5) ISM : molecules planetary systems : protoplanetary disks stars : formation |
ISSN号 | 0004-637X |
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 |
内容类型 | 期刊论文 |
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. |
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