CO J=3-2 Emission from the "Water Fountain" Sources IRAS 16342-3814 and IRAS 18286-0959

	CO J=3-2 Emission from the "Water Fountain" Sources IRAS 16342-3814 and IRAS 18286-0959
	Imai, H 1; He JH(何金华)2 ; Nakashima, J 3; Ukita, N 4; Deguchi, S 5; Koning, N 6
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2009
卷号	61 期号:6 页码:1365-1372
关键词	stars: AGB and post-AGB stars: individual (IRAS 16342-3814, IRAS 18286-0959)
ISSN号	0004-6264
通讯作者	Imai, H (reprint author), Kagoshima Univ, Grad Sch Sci & Engn, 1-21-35 Korimoto, Kagoshima 8900065, Japan.
产权排序	第二完成单位
英文摘要	We observed CO J = 3-2 emission from "water-fountain" sources, which exhibit high-velocity collimated stellar jets traced by H(2)O maser emission, with the Atacama Submillimeter Telescope Experiment (ASTE) 10m telescope. We detected CO emission from two sources: IRAS 16342-3814 and IRAS 18286-0959. The IRAS 16342-3814 CO emission exhibits a spectrum that could be well fit to a Gaussian profile, rather than to a parabolic profile, with a velocity width (FWHM) of 158 +/- 6 km s(-1) and an intensity peak at V(LSR)= 50 +/- 2 km s(-1). The mass-loss rate of the star is estimated to be similar to 2.9 x 10(-5) M(circle dot) yr(-1). Our morpho-kinematic models suggest that the CO emission is optically thin, and associated with a bipolar outflow rather than with a (cold and relatively small) torus. The IRAS 18286-0959 CO emission has a velocity width (FWHM) of 3.0 +/- 0.2 km s(-1) smaller than typically seen in AGB envelopes. The narrow velocity width of-the CO emission suggests that it originates from either an interstellar molecular cloud or a slowly-rotating circumstellar envelope that harbors the H(2)O maser source.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ASYMPTOTIC GIANT BRANCH ; POST-AGB STARS ; MASS-LOSS ; PREPLANETARY NEBULA ; PLANETARY-NEBULAE ; EVOLVED STARS ; BIPOLAR OUTFLOWS ; 45-M TELESCOPE ; SIO MASER ; JET
收录类别	SCI
原文出处	http://pasj.oxfordjournals.org/content/61/6/1365
语种	英语
WOS记录号	WOS:000273306300019
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4479]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, China 3.Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong, China 4.ALMA Project Office, National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 5.Nobeyama Radio Observatory, National Astronomical Observatory, Minamimaki, Minamisaku, Nagano 384-1305 6.Department of Physics and Astronomy, University of Calgary, Calgary, AB T2N 1N4, Canada
推荐引用方式 GB/T 7714	Imai, H,He JH,Nakashima, J,et al. CO J=3-2 Emission from the "Water Fountain" Sources IRAS 16342-3814 and IRAS 18286-0959[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2009,61(6):1365-1372.
APA	Imai, H,He JH,Nakashima, J,Ukita, N,Deguchi, S,&Koning, N.(2009).CO J=3-2 Emission from the "Water Fountain" Sources IRAS 16342-3814 and IRAS 18286-0959.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,61(6),1365-1372.
MLA	Imai, H,et al."CO J=3-2 Emission from the "Water Fountain" Sources IRAS 16342-3814 and IRAS 18286-0959".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61.6(2009):1365-1372.