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The J(2)-J(1) E methanol transitions for J>=12 in Orion KL
Wilson, TL; Zeng, Q; Huttemeister, S; Dahmen, G
1996-03-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume307Issue:1Pages:209-214
AbstractThe first astronomical measurements of the J(k) = 12(2) - 12(1), 14(2) - 14(1), 15(2) - 15(1), 16(2) - 16(1), and 17(2) - 17(1) transitions of E type methanol are presented. Corrections to the line rest frequencies are significant. A map of the averaged J = 15 to 17 lines shows that the emission arises from a region of 35 ''(delta) by similar to 20 ''(alpha) FWHP size, centered similar to 7 '' south, <2 '' west of the Hot Core. This is the Methanol Emission Center; the most intense CH3OH masers are 15 '' to the NW. The J greater than or equal to 12 profiles are adequately fitted with two gaussian velocity components with FWHP Delta upsilon(1/2) approximate to 0.8 km s(-1) and approximate to 3 km s(-1). For the wider component, our data give a rotational temperature of similar to 100 K. Excitation calculations indicate that the J(2) - J(1) populations are inverted; the narrow velocity component in the J = 15 to 17 transitions may be a low gain maser.
KeywordMasers Molecular Data Ism, Individual, Orion Kl, Molecules Radio Lines, Ism
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordSUBMILLIMETER-WAVE SPECTRUM ; MILLIMETER-WAVE ; MASERS ; GHZ ; LINES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:A1996TZ45200027
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8462
Collection期刊(老文献)
Affiliation1.PURPLE MT OBSERV, NANJING 210008, PEOPLES R CHINA
2.HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA
Recommended Citation
GB/T 7714
Wilson, TL,Zeng, Q,Huttemeister, S,et al. The J(2)-J(1) E methanol transitions for J>=12 in Orion KL[J]. ASTRONOMY & ASTROPHYSICS,1996,307(1):209-214.
APA Wilson, TL,Zeng, Q,Huttemeister, S,&Dahmen, G.(1996).The J(2)-J(1) E methanol transitions for J>=12 in Orion KL.ASTRONOMY & ASTROPHYSICS,307(1),209-214.
MLA Wilson, TL,et al."The J(2)-J(1) E methanol transitions for J>=12 in Orion KL".ASTRONOMY & ASTROPHYSICS 307.1(1996):209-214.
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