Institutional Repository of Radio Astronomy Research Laboratory
| FLASHING: New high-velocity H2O masers in IRAS 18286-0959 | |
Imai, Hiroshi1,2,3; Uno, Yuri3; Maeyama, Daichi4; Yamaguchi, Ryosuke4; Amada, Kei3; Hamae, Yuhki4; Orosz, Gabor5,6 ; Gomez, Jose F.7; Tafoya, Daniel8,9; Uscanga, Lucero10; Burns, Ross A.8,11
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| 2020-08-01 | |
| Source Publication | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| ISSN | 0004-6264 |
| Volume | 72Issue:4Pages:58 |
| Contribution Rank | 6 |
| Abstract | We discovered new high-velocity components of H2O maser emission in one of the "water fountain" sources, IRAS 18286-0959, which has been monitored using the Nobeyama 45 m telescope in the FLASHING (Finest Legacy Acquisitions of SiO- and H2O-maser Ignitions by Nobeyama Generation) project since 2018 December. The maser spectra show new components with extremely high expansion velocities (>200 km s(-1) projected in the line of sight), some of which are located symmetrically in the spectrum with respect to the systemic velocity. They were also mapped with KaVA (KVN and VERA Combined Array) in 2019 March. We located some of these maser components closer to the central stellar system than other high-velocity components (50-200 km s(-1)) that have been confirmed to be associated with the known bipolar outflow. The new components would have flashed in the fast collimated jet at a speed of over 300 km s(-1 )(soon) after 2011 when they had not been detected. The fastest of the new components seem to indicate rapid deceleration in these spectra; however, our present monitoring is still too sparse to unambiguously confirm it (up to 50 km s(-1) yr(-1)) and too short to reveal their terminal expansion velocity, which will be equal to the expansion velocity that has been observed (v(exp) similar to 120 km s(-1)). Future occurrences of such extreme-velocity components may provide a good opportunity to investigate possible recurrent outflow ignitions. Thus, the sculpture of the parental envelope will be traced by the dense gas that is entrained by the fast jet and exhibits spectacular distributions of the relatively stable maser features. |
| Keyword | masers stars: AGB and post-AGB stars: individuals (IRAS 18286-0959) |
| DOI | 10.1093/pasj/psaa047 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | COLLIMATED JET ; WATER ; STARS |
| Funding Project | MEXT KAKENHI program[16H02167] ; MINECO (Spain)[AYA2017-84390-C2-R] ; FEDER ; State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award[SEV-2017-0709] ; Invitation Program for Foreign Researchers of the Japan Society for Promotion of Science (JSPS)[S14128] ; i-LINK+2019 Programme in IAA/CSIC ; Australian Research Council of the Australian government[DP180101061] ; CAS LCWR[2018-XBQNXZ-B-021] ; National Key R&D Program of China[2018YFA0404602] ; ERC[614264] ; EACOA Fellowship from the East Asian Core Observatories Association ; Convocatoria de Apoyo a la Investigacion Cientifica 2020 of the University of Guanajuato |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000593159200009 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | MEXT KAKENHI program ; MINECO (Spain) ; FEDER ; State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award ; Invitation Program for Foreign Researchers of the Japan Society for Promotion of Science (JSPS) ; i-LINK+2019 Programme in IAA/CSIC ; Australian Research Council of the Australian government ; CAS LCWR ; National Key R&D Program of China ; ERC ; EACOA Fellowship from the East Asian Core Observatories Association ; Convocatoria de Apoyo a la Investigacion Cientifica 2020 of the University of Guanajuato |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3803 |
| Collection | 射电天文研究室_星系宇宙学研究团组 |
| Corresponding Author | Imai, Hiroshi |
| Affiliation | 1.Kagoshima Univ, Amanogawa Galaxy Astron Res Ctr, Grad Sch Sci & Engn, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan 2.Kagoshima Univ, Ctr Gen Educ, Inst Comprehens Educ, 1-21-30 Korimoto, Kagoshima, Kagoshima 8900065, Japan 3.Kagoshima Univ, Grad Sch Sci & Engn, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan 4.Kagoshima Univ, Fac Sci, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan 5.Univ Tasmania, Sch Nat Sci, Private Bag 37, Hobart, Tas 7001, Australia 6.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 7.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 8.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 9.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden 10.Univ Guanajuato, Dept Astron, AP 144, Guanajuato 36000, Gto, Mexico 11.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea |
| Recommended Citation GB/T 7714 | Imai, Hiroshi,Uno, Yuri,Maeyama, Daichi,et al. FLASHING: New high-velocity H2O masers in IRAS 18286-0959[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2020,72(4):58. |
| APA | Imai, Hiroshi.,Uno, Yuri.,Maeyama, Daichi.,Yamaguchi, Ryosuke.,Amada, Kei.,...&Burns, Ross A..(2020).FLASHING: New high-velocity H2O masers in IRAS 18286-0959.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,72(4),58. |
| MLA | Imai, Hiroshi,et al."FLASHING: New high-velocity H2O masers in IRAS 18286-0959".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 72.4(2020):58. |
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| Imai-2020-FLASHING_ （829KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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