A 1 mm SPECTRAL LINE SURVEY TOWARD GLIMPSE EXTENDED GREEN OBJECTS (EGOs)

doi:10.1088/0067-0049/202/1/1

YNAO OpenIR > 大样本恒星演化研究组

	A 1 mm SPECTRAL LINE SURVEY TOWARD GLIMPSE EXTENDED GREEN OBJECTS (EGOs)
	He JH(何金华)1 ; Takahashi, S 2; Chen, X 3; He, JH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming 650011, Yunnan Province, Peoples R China.
发表期刊	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2012-09
卷号	202 期号:1
DOI	10.1088/0067-0049/202/1/1
产权排序	第1完成单位
收录类别	SCI
关键词	Ism: Clouds Ism: Jets And Outflows Ism: Kinematics And Dynamics Radio Lines: Ism Stars: Formation Turbulence
摘要	A northern subsample of 89 Spitzer GLIMPSE extended green objects (EGOs), the candidate massive young stellar objects, are surveyed for molecular lines in two 1 GHz ranges: 251.5-252.5 and 260.188-261.188 GHz. A comprehensive catalog of observed molecular line data and spectral plots are presented. Eight molecular species are undoubtedly detected: (HCO+)-C-13, SiO, SO, CH3OH, CH3OCH3, CH3CH2CN, HCOOCH3, and (HNC)-C-13. The (HCO+)-C-13 3-2 line is detected in 70 EGOs, among which 37 also show the SiO 6-5 line, demonstrating their association with dense gas and supporting the outflow interpretation of the extended 4.5 mu m excess emission. Our major dense gas and outflow tracers ((HCO+)-C-13, SiO, SO, and CH3OH) are combined with our previous survey of (CO)-C-13, (CO)-C-12, and (CO)-O-18 1-0 toward the same sample of EGOs for a multi-line, multi-cloud analysis of linewidth and luminosity correlations. Good log-linear correlations are found among all considered line luminosities, the explanation of which requires a universal similarity of density and thermal structures and probably of shock properties among all EGO clouds. It also requires that the shocks be produced within the natal clouds of the EGOs. Diverse degrees of correlation are found among the linewidths. However, both the linewidth and luminosity correlations tend to progressively worsen across larger cloud subcomponent size scales, depicting the increase of randomness across cloud subcomponent sizes. Moreover, the linewidth correlations among the three isotopic CO 1-0 lines show data scatter as linear functions of the linewidth itself, indicating that the velocity randomness also increases with whole cloud sizes in a regular way.
项目资助者	Western Light project of China ; Chinese National Science Foundation [11173056, 11073041, 11133008] ; postdoctoral fellowship at the Institute of Astronomy and Astrophysics, Academia Sinica, Taiwan
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0067-0049
URL	查看原文
归档日期	2012-10-25
WOS记录号	WOS:000309557300001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	FAST MOLECULAR SHOCKS ; INFRARED DARK CLOUDS ; MASS STAR-FORMATION ; METHANOL MASERS ; CLASS-I ; INTERSTELLAR SHOCKS ; COLOGNE DATABASE ; HOT CORES ; CHEMISTRY ; EMISSION
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4523
专题	大样本恒星演化研究组中国科学院天体结构与演化重点实验室
通讯作者	He, JH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming 650011, Yunnan Province, Peoples R China.
作者单位	1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Astronomical Observatory/National Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650011 Yunnan Province, China 2.Academia Sinica, Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan 3.Key Laboratory for Research in Galaxies and Cosmology, Key Laboratory of Radio Astronomy, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	He JH,Takahashi, S,Chen, X,et al. A 1 mm SPECTRAL LINE SURVEY TOWARD GLIMPSE EXTENDED GREEN OBJECTS (EGOs)[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2012,202(1).
APA	He JH,Takahashi, S,Chen, X,&He, JH .(2012).A 1 mm SPECTRAL LINE SURVEY TOWARD GLIMPSE EXTENDED GREEN OBJECTS (EGOs).ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,202(1).
MLA	He JH,et al."A 1 mm SPECTRAL LINE SURVEY TOWARD GLIMPSE EXTENDED GREEN OBJECTS (EGOs)".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 202.1(2012).

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