2000A&AS..142..181C


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.07CEST21:18:24

2000A&AS..142..181C - Astron. Astrophys., Suppl. Ser., 142, 181-215 (2000/March-1)

A λ2 mm molecular line survey of the C-star envelope IRC+10 216.

CERNICHARO J., GUELIN M. and KAHANE C.

Abstract (from CDS):

The mm-wave spectrum of the C-star envelope IRC+10 216 has been continuously surveyed between 129.0 and 172.5GHz with the IRAM 30-m telescope. 380 lines are detected, of which 317 have been identified. The identified lines arise from 30 different molecules and radicals which, in their vast majority, are not observed in hot and dense interstellar clouds such as Orion A or W3(OH). Actually, half of the molecular species identified in the mm-wave spectrum of IRC+10216 were first observed in the course of this spectral survey. The new species include several carbon-chain molecules and radicals, as well as silicon and metallic compounds. They also include molecules containing rare isotopes of C, Mg, Si, S and Cl, whose elemental abundance ratios in the envelope are redetermined. We observe, in particular, four 13C isotopomers of C4H, three of C3N and HC3N, and four doubly-substituted isotopomers of SiS and CS. 63 lines remain unidentified. Probably, a large fraction of those are rotational transitions inside the excited bending states of the abundant species NaCN, C5H, and C6H. We can also expect some lines to be ground state transitions of poorly known silicon and metal compounds, such as the slightly asymmetrical top molecule SiCSi.

Abstract Copyright:

Journal keyword(s): line identification - surveys - stars: AGB and post-AGB - stars: carbon - stars: circumstellar matter - stars: individual: IRC+10 216 - ISM: molecules - radio lines: stars

VizieR on-line data: <Available at CDS (J/A+AS/142/181): tables 1, 2, 2, 4, 5, 6, 7, 8, 9 + tables.tex >

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1421 0
2 M 42 HII 05 35 17.3 -05 23 28           ~ 3794 0
3 NAME Ori A MoC 05 38 -07.1           ~ 2760 0
4 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2189 0
5 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2004 1

    Equat.    Gal    SGal    Ecl

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2021.05.07-21:18:24

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