J/A+A/606/A74 IRC +10216 13.3GHz-18.5GHz spectrum (Zhang+, 2017)
A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz.
Zhang X.Y., Zhu Q.F., Li J., Chen X., Wang J.Z., Zhang J.S.
<Astron. Astrophys. 606, A74 (2017)>
=2017A&A...606A..74Z 2017A&A...606A..74Z (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, carbon ; Spectroscopy
Keywords: stars: individual: IRC +10216 - radio lines: stars -
line: identification
Abstract:
A spectral line survey of IRC +10216 between 13.3 and 18.5GHz was
carried out using the Shanghai Tian Ma 65 m Radio Telescope (TMRT-65m)
with a sensitivity of <7mK. Thirty-five spectral lines of 12
different molecules and radicals were detected in total. Except for
SiS, the detected molecules are all carbon-chain molecules, including
HC3N, HC5N, HC7N, HC9N, C6H, C6H-, C8H, SiC2,
SiC4, c-C3H2, and l-C5H. The presence of rich carbon-bearing
molecules is consistent with the identity of IRC +10216 as a
carbon-rich asymptotic giant branch (AGB) star. The excitation
temperatures and column densities of the observed species are derived
by assuming a local thermodynamic equilibrium and homogeneous
conditions.
Description:
The observations of the line survey between 13.3 and 18.5GHz toward
IRC +10216 were observed with the Shanghai Tian Ma 65m Radio
Telescope (TMRT-65m).
Objects:
-----------------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------------
09 47 57.45 +13 16 43.8 IRC +10216 = V* CW Leo
-----------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
fig1.dat 15 56718 Overview of the spectral line survey of
IRC +10216 between 13.3 and 18.5GHz
list.dat 57 7 List of spectra in irc10216.fit file
irc10216.fit 2880 163 Fits spectrum file
--------------------------------------------------------------------------------
See also:
J/A+A/330/676 : IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998)
J/ApJS/177/275 : 1.3 and 2mm survey of IRC+10216 (He+, 2008)
J/ApJ/688/L83 : Detection of C5N- in IRC +10216 (Cernicharo+, 2008)
J/ApJS/190/348 : 1mm spectral survey of IRC+10216 + VY CMa (Tenenbaum+, 2010)
J/ApJS/193/17 : Spectral-line survey of IRC+10216 at 293-355GHz (Patel+, 2011)
J/A+A/545/A12 : Chemistry of IRC+10216 inner wind modelled (Cherchneff, 2012)
J/A+A/574/A56 : IRC +10216 17.8GHz-26.3GHz spectrum (Gong+, 2015)
J/ApJ/806/L3 : Disilicon carbide (SiCSi) in CW Leo (Cernicharo+, 2015)
J/A+A/601/A4 : IRC+10216 carbon chains mapped with ALMA (Agundez+, 2017)
Byte-by-byte Description of file: fig1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 MHz Freq Observed line frequency
11- 15 F5.1 mK Tmb Main beam temperature
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20 I1 --- Seq Sequential number
22- 26 I5 --- Scan Scan number
28- 37 A10 "date" Obs.Date Observation date
39- 48 F10.4 d MJD UT observation date
50- 57 E8.3 Hz RestFreq Rest frequency
--------------------------------------------------------------------------------
Acknowledgements:
Xiao-Yan Zhang, xyz1128(at)mail.ustc.edu.cn
(End) Patricia Vannier [CDS] 06-Sep-2017