FLASHING: New high-velocity H2O masers in IRAS 18286-0959

doi:10.1093/pasj/psaa047

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 星系宇宙学研究团组

	FLASHING: New high-velocity H2O masers in IRAS 18286-0959
	Imai, Hiroshi 7,8,9; Uno, Yuri 7; Maeyama, Daichi 10; Yamaguchi, Ryosuke 10; Amada, Kei 7; Hamae, Yuhki 10; Orosz, Gabor 1,11; Gomez, Jose F.2; Tafoya, Daniel 3,4; Uscanga, Lucero 5
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2020-08-01
卷号	72 期号:4 页码:58
关键词	masers stars: AGB and post-AGB stars: individuals (IRAS 18286-0959)
ISSN号	0004-6264
DOI	10.1093/pasj/psaa047
产权排序	6
英文摘要	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.
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资助项目	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关键词	COLLIMATED JET ; WATER ; STARS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000593159200009
资助机构	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
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3802]
专题	星系宇宙学研究团组
通讯作者	Imai, Hiroshi
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 3.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 4.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden 5.Univ Guanajuato, Dept Astron, AP 144, Guanajuato 36000, Gto, Mexico 6.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea 7.Kagoshima Univ, Grad Sch Sci & Engn, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan 8.Kagoshima Univ, Ctr Gen Educ, Inst Comprehens Educ, 1-21-30 Korimoto, Kagoshima, Kagoshima 8900065, Japan 9.Kagoshima Univ, Amanogawa Galaxy Astron Res Ctr, Grad Sch Sci & Engn, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan 10.Kagoshima Univ, Fac Sci, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima, Kagoshima 8900065, Japan
推荐引用方式 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.