Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet

doi:10.3847/2041-8213/ab70b8

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	Shaping the Envelope of the Asymptotic Giant Branch Star W43A with a Collimated Fast Jet
	Tafoya, Daniel 9; Imai, Hiroshi 1,7; Gomez, Jose F.6; Nakashima, Jun-ichi 5; Orosz, Gabor 3,4; Yung, Bosco H. K.2
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2020-02-10
卷号	890 期号:1 页码:L14
关键词	Asymptotic giant branch stars Stellar jets
ISSN号	2041-8205
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
内容类型	期刊论文
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.Kagoshima Univ, Grad Sch Sci & Engn, Amanogawa Galaxy Astron Res Ctr, 1-21-35 Korimoto, Kagoshima 8900065, Japan 2.Nicolaus Copernicus Astron Ctr, Rabianska 8, PL-87100 Torun, Poland 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 4.Univ Tasmania, Sch Nat Sci, Private Bag 37, Hobart, Tas 7001, Australia 5.Sun Yat Sen Univ, Sch Phys & Astron, Dept Astron, Zhuhai 519082, Peoples R China 6.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 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.