Rapidly evolving episodic outflow in IRAS 18113-2503: clues to the ejection mechanism of the fastest water fountain
文献类型：期刊论文
| 作者 | Orosz, G.1,2 ; Gomez, J. F.3,14; Imai, H.4,5; Tafoya, D.6; Torrelles, J. M.5,7,8; Burns, R. A.9; Frau, P.; Guerrero, M. A.3; Miranda, L. F.3; Perez-Torres, M. A.3
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2019 |
| 卷号 | 482期号:1页码:L40-L45 |
| 关键词 | masers astrometry stars: AGB and post-AGB binaries: general stars: individual (IRAS 18113-2503) stars: jets |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnrasl/sly177 |
| 产权排序 | 1 |
| 英文摘要 | Water fountains are evolved stars showing early stages of collimated mass-loss during transition from the asymptotic giant branch, providing valuable insight into the formation of asymmetric planetary nebulae. We report the results of multi-epoch VLBI observations, which determine the spatial and three-dimensional kinematic structure of H2O masers associated with the water fountain IRAS 18113-2503. The masers trace three pairs of high-velocity (similar to 150-300 km s(-1)) bipolar bow shocks on a scale of 0 ''.18 (similar to 2000 au). The expansion velocities of the bow shocks exhibit an exponential decrease as a function of distance from the central star, which can be explained by an episodic, jet-driven outflow decelerating due to drag forces in a circumstellar envelope. Using our model, we estimate an initial ejection velocity similar to 840 km s(-1), a period for the ejections similar to 10 yr, with the youngest being similar to 12 yr old, and an average envelope density within the H2O maser region n(H2) approximate to 10(6) cm(-3). We hypothesize that IRAS 18113-2503 hosts a binary central star with a separation of similar to 10 au, revealing novel clues about the launching mechanisms of high-velocity collimated outflows in water fountains. |
| WOS关键词 | PREPLANETARY NEBULA ; COLLIMATED JET ; MASS ; DISTANCE ; SHAPES ; WIND ; STAR |
| 资助项目 | National Key R&D Program of China[2018YFA0404602] ; Xinjiang Key Laboratory of Radio Astrophysics grant[2016D03020] ; NSFC[11503072] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Joint Institute of VLBI ERIC, Kagoshima University ; MEXT Monbukagakusho scholarship ; MINECO (Spain) - FEDER[AYA2014-57369-C3] ; MINECO (Spain) - FEDER[AYA2017-84390-C2-R] ; MEXTKAKENHI program[16H02167] ; Invitation Program for Foreign Researchers of the Japan Society for Promotion of Science (JSPS grants)[S17115] ; Invitation Program for Foreign Researchers of the Japan Society for Promotion of Science (JSPS grants)[S14128] ; ERC consolidator grant[614264] ; MINECO[AYA2014-57280-P] ; MINECO[AYA2012-38491-C02-02] ; MINECO[AYA2015-63939-C2-1-P] ; MINECO[ESP2015-65597-C4-1-R] ; FEDER[ESP2015-65597-C4-1-R] ; University of Guanajuato (Mexico)[CIIC 17/2018] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000482176700009 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/2970]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Orosz, G. |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.MTA Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary 3.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 4.Kagoshima Univ, Inst Comprehens Educ, Ctr Gen Educ, 1-21-30 Korimoto, Kagoshima 8900065, Japan 5.Kagoshima Univ, Grad Sch Sci & Engn, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima 8900065, Japan 6.Natl Inst Nat Sci, Natl Astron Observ Japan, Chile Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 7.CSIC, ICE, Can Magrans S-N, E-08193 Cerdanyola Del Valles, Catalonia, Spain 8.IEEC, E-08034 Barcelona, Catalonia, Spain 9.Joint Inst VLBI ERIC JIVE, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands 10.Univ Guadalajara, CUCEI, Inst Astron & Meteorol, Ave Vallarta 2602, Guadalajara 44130, Jalisco, Mexico |
| 推荐引用方式 GB/T 7714 | Orosz, G.,Gomez, J. F.,Imai, H.,et al. Rapidly evolving episodic outflow in IRAS 18113-2503: clues to the ejection mechanism of the fastest water fountain[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,482(1):L40-L45. |
| APA | Orosz, G..,Gomez, J. F..,Imai, H..,Tafoya, D..,Torrelles, J. M..,...&Uscanga, L..(2019).Rapidly evolving episodic outflow in IRAS 18113-2503: clues to the ejection mechanism of the fastest water fountain.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,482(1),L40-L45. |
| MLA | Orosz, G.,et al."Rapidly evolving episodic outflow in IRAS 18113-2503: clues to the ejection mechanism of the fastest water fountain".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482.1(2019):L40-L45. |
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