J/ApJS/177/275 1.3 and 2mm survey of IRC+10216 (He+, 2008)
A spectral line survey in the 2 and 1.3 mm windows toward the carbon-rich
envelope of IRC +10216.
He J.H., Dinh-V-Trung J.H., Kwok S., Muller H.S.P., Zhang Y., Hasegawa T.,
Peng T.C., Huang Y.C.
<Astrophys. J. Suppl. Ser., 177, 275-325 (2008)>
=2008ApJS..177..275H 2008ApJS..177..275H
ADC_Keywords: Radio lines ; Spectra, millimetric/submm
Keywords: line: identification - radio lines: ISM - stars: AGB and post-AGB
stars: individual (IRC+10216) - submillimeter - surveys
Abstract:
We present the results of our spectral line surveys in the 1.3 and 2mm
windows toward the carbon-rich envelope of IRC+10216. There were 377
lines detected in total, of which 360 lines are assigned to 57 known
molecules (including 29 rare isotopomers and two cyclic isomers). Only
17 weak lines remain unidentified. Rotational lines of isotopomers
13CCH and HN13C are detected for the first time in IRC+10216 .
The detection of the formaldehyde lines in this star is also
confirmed. Possible abundance differences among the three
13C-substituted isotopic isomers of HC3N is reported. Isotopic
ratios of C and O are confirmed to be nonsolar while those of S and Si
to be nearly solar. Column densities have been estimated for 15
molecular species. Modified spectroscopic parameters have been
calculated for NaCN, Na13CN, KCN, and SiC2. Transition frequencies
from the present observations were used to improve the spectroscopic
parameters of Si13CC, 29SiC2, and 30SiC2.
Description:
The surveys were carried out using the 2mm receiver of the Arizona
Radio Observatory (ARO) 12m Telescope (KP12M) at Kitt Peak (2005 April
26 to 2006 April 29) and the 1.3mm JT receiver of the Heinrich Hertz
Submillimeter Telescope (SMT) at Mt. Graham (2005 October 31 to 2007
January 24). Observed frequency ranges are 131.2-160.3GHz for the 2mm
survey, 219.5-245.5 and 251.5-267.5GHz for the 1.3mm survey.
Objects:
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RA (2000) DE Designation(s)
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09 47 57.4 +13 16 44 IRC+10216 = NAME PEANUT NEBULA
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 113 409 Line parameters of all detected lines in our survey
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See also:
J/A+AS/142/181 : 2mm molecular line survey of IRC+10 216 (Cernicharo+, 2000)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 ---- Species Species name
12- 45 A34 ---- Trans Transition
47- 55 F9.2 MHz Freq ? Observed line frequency
57- 60 F4.2 MHz e_Freq ? Uncertainty in Freq
62- 70 F9.2 MHz Freq0 ? Line frequency from CDMS/JPL catalogs (1)
72 A1 ---- n_Freq0 [abd] Note on Freq0 (2)
74- 79 F6.2 K.km/s Iint ? Integrated line intensity
81 A1 ---- n_Iint [*] Note on Iint (3)
83- 86 F4.2 K.km/s e_Iint ? Uncertainty in Iint
88- 92 I5 mK Tlc ? Fitted main beam temperature at line center
94- 96 I3 mK e_Tlc ? Uncertainty in Tlc
98-102 F5.2 km/s Vexp ? Fitted outflow velocity
104-108 F5.2 km/s e_Vexp ? Uncertainty in Vexp
110-113 A4 ---- Blend Notes on line blending (4)
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Note (1): Line identification was performed by using the Cologne Database
for Molecular Spectroscopy (CDMS; see Muller et al., 2001A&A...370L..49M 2001A&A...370L..49M,
2005JMoSt.742..215M 2005JMoSt.742..215M) and the Molecular Spectroscopy database of Jet
Propulsion Laboratory (JPL; see Pickett et al., 1998JQSRT..60..883P 1998JQSRT..60..883P).
Note (2): Notes on line frequency as follows:
a = average frequency of hyperfine components;
b = same as a, but the hyperfine of components of neighbouring fine
structure lines blended together, so that the fine structure lines are
also partially blended. (for MgNC);
d = unresolved lambda doublet (for SiC).
Note (3): Note on Iint:
* = Integrated line intensity derived from SHELL fitting.
Note (4): Notes on line blending as follows:
s = single lines;
a = lines fitted using fixed line frequency and line width of 14.5km/s;
b = lines too narrow;
c = differentiable blended lines of the same species;
d = undifferentiable blended lines of different species;
e = differentiable blended lines of the same species;
(hyperfine or lambda doublet or weak asymmetric transitions);
f = undifferentiable blended lines of different species.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Sep-2009