Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/688/L83       Detection of C5N- in IRC +10216      (Cernicharo+, 2008)

Detection of C5N- and vibrationally excited C6H in IRC +10216. Cernicharo J., Guelin M., Agundez M., McCarthy M.C., Thaddeus P. <Astrophys. J., 688, L83-L86 (2008)> =2008ApJ...688L..83C
ADC_Keywords: Interstellar medium ; Radio lines ; Stars, carbon Keywords: circumstellar matter - ISM: molecules - radio lines: ISM - stars: AGB and post-AGB - stars: individual (IRC+10216) Abstract: We report the detection in the envelope of the C-rich star IRC+10216 of four series of lines with harmonically related frequencies: B1389, B1390, B1394, and B1401. The four series must arise from linear molecules with mass and size close to those of C6H and C5N. Three of the series have half-integer rotational quantum numbers; we assign them to the 2Δ and 2Σ- vibronic states of C6H in its lowest (ν11) bending mode. The fourth series, B1389, has integer J with no evidence of fine or hyperfine structure; it has a rotational constant of 1388.860(2)MHz and a centrifugal distortion constant of 33(1)Hz; it is almost certainly the C5N- anion. Description: The astronomical observations presented here are mainly from a spectral line survey of IRC+10216 done with the IRAM 30m telescope between 1995 and 2008 (Cernicharo et al. 2000, Cat. J/A+AS/142/181; J. Cernicharo et al. 2008, in preparation). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 09 47 57.4 +13 16 44 IRC+10216 = V* CW Leo ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 71 54 Observed line parameters in IRC+10216
See also: J/A+AS/142/181 : 2mm molecular line survey of IRC+10 216 (Cernicharo+, 2000) J/ApJS/177/275 : 1.3 and 2mm survey of IRC+10216 (He+, 2008) J/ApJS/190/348 : 1mm spectral survey of IRC+10216 + VY CMa (Tenenbaum+, 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 16 A16 --- Line Line identification (1) 18- 28 A11 --- Trans Transition 30- 37 F8.1 MHz Freq Observed frequency 39- 41 F3.1 MHz e_Freq The 1σ uncertainty in Freq 43- 50 F8.1 MHz CFreq Calculated frequency 52- 55 F4.2 K.km/s Temp Integrated antenna temperature (2) 57- 60 F4.2 K.km/s e_Temp The 1σ uncertainty in Temp 62- 65 F4.1 km/s Vexp Line width parameter 67- 69 F3.1 km/s e_Vexp ? The 1σ uncertainty in Vexp 71 A1 --- f_Vexp [a] Indicates Vexp has been fixed
Note (1): Derived rotational constants following table 2: ------------------------------------------------------- Series B(MHz) D(Hz) Nlines J-Range ------------------------------------------------------- B1389 1388.860±0.002 33±1 13 8, 29-40 B1390 1389.878±0.007 -35±3 9 59/2-79/2 B1394 1394.609±0.010 32±4 22 29-41 B1401 1401.559±0.026 139±7 7 59/2-75/2 ------------------------------------------------------- See section 3 for further details. Note (2): Corrected for atmospheric absorption and rear spillover losses, by means of the ATM code (Cernicharo 1985, ATM: A Program to Compute Atmospheric Opacity between 0-1000GHz, IRAM Internal Report).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact