Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet
文献类型：期刊论文
| 作者 | Tafoya, Daniel9; Imai, Hiroshi6,7; Gomez, Jose F.5; Nakashima, Jun-ichi4; Orosz, Gabor2,3 ; Yung, Bosco H. K.1
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 出版日期 | 2020-02-10 |
| 卷号 | 890期号:1页码:L14 |
| ISSN号 | 2041-8205 |
| 关键词 | Asymptotic giant branch stars Stellar jets |
| DOI | 10.3847/2041-8213/ab70b8 |
| 产权排序 | 8 |
| 英文摘要 | One of the major puzzles in the study of stellar evolution is the formation process of bipolar and multipolar planetary nebulae. There is growing consensus that collimated jets create cavities with dense walls in the slowly expanding (10-20 km s(-1)) envelope ejected in previous evolutionary phases, leading to the observed morphologies. However, the launching of the jet and the way it interacts with the circumstellar material to create such asymmetric morphologies have remained poorly known. Here we present for the first time CO emission from the asymptotic giant branch star W43A that traces the whole stream of a jet, from the vicinity of its driving stellar system out to the regions where it shapes the circumstellar envelope. We found that the jet has a launch velocity of 175 km s(-1) and decelerates to a velocity of 130 km s(-1) as it interacts with circumstellar material. The continuum emission reveals a bipolar shell with a compact bright dot in the center that pinpoints the location of the driving source of the jet. The kinematical ages of the jet and the bipolar shell are equal, tau similar to 60 yr, indicating that they were created simultaneously, probably by a common underlying mechanism, and in an extremely short time. These results provide key initial conditions for the theoretical models that aim to explain the formation of bipolar morphologies in the circumstellar envelopes of low- and intermediate-mass stars. |
| 资助项目 | MINECO (Spain) grant (FEDER)[AYA2017-84390-C2-R] ; State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award[SEV-2017-0709] ; MEXT KAKENHI program[16H02167] ; Invitation Program for Foreign Researchers of the Japan Society for Promotion of Science (JSPS)[S14128] ; Australian Research Council of the Australian government[DP180101061] ; CAS of China[LCWR 2018-XBQNXZ-B-021] ; National Key R&D Program of China[2018YFA0404602] ; ERC[614264] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000526403200001 |
| 资助机构 | MINECO (Spain) grant (FEDER) ; State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award ; MEXT KAKENHI program ; Invitation Program for Foreign Researchers of the Japan Society for Promotion of Science (JSPS) ; Australian Research Council of the Australian government ; CAS of China ; National Key R&D Program of China ; ERC |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/3460]  |
| 专题 | 星系宇宙学研究团组 |
| 通讯作者 | Tafoya, Daniel |
| 作者单位 | 1.Nicolaus Copernicus Astron Ctr, Rabianska 8, PL-87100 Torun, Poland 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.Univ Tasmania, Sch Nat Sci, Private Bag 37, Hobart, Tas 7001, Australia 4.Sun Yat Sen Univ, Sch Phys & Astron, Dept Astron, Zhuhai 519082, Peoples R China 5.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 6.Kagoshima Univ, Grad Sch Sci & Engn, Amanogawa Galaxy Astron Res Ctr, 1-21-35 Korimoto, Kagoshima 8900065, Japan 7.Kagoshima Univ, Inst Comprehens Educ, Ctr Gen Educ, 1-21-30 Korimoto, Kagoshima 8900065, Japan 8.Natl Inst Nat Sci, Natl Astron Observ Japan, Chile Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 9.Chalmers Univ Technol, Onsala Space Observ, Dept Space Earth & Environm, SE-43992 Onsala, Sweden |
| 推荐引用方式 GB/T 7714 | Tafoya, Daniel,Imai, Hiroshi,Gomez, Jose F.,et al. Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,890(1):L14. |
| APA | Tafoya, Daniel,Imai, Hiroshi,Gomez, Jose F.,Nakashima, Jun-ichi,Orosz, Gabor,&Yung, Bosco H. K..(2020).Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet.ASTROPHYSICAL JOURNAL LETTERS,890(1),L14. |
| MLA | Tafoya, Daniel,et al."Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet".ASTROPHYSICAL JOURNAL LETTERS 890.1(2020):L14. |
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