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J/ApJS/194/34 Fourier transform emission spectroscopy of 13C14N (Ram+, 2011)

Fourier transform emission spectroscopy of the B2Σ+-X2Σ+ (violet) system of 13C14N. Ram R.S., Bernath P.F. <Astrophys. J. Suppl. Ser., 194, 34 (2011)> =2011ApJS..194...34R
ADC_Keywords: Spectroscopy ; Atomic physics Keywords: comets: general - methods: laboratory - molecular data - stars: abundances - stars: carbon - techniques: spectroscopic Abstract: Emission spectra of the B2Σ+-X2Σ+ transition of 13C14N have been observed at high resolution using the Fourier transform spectrometer associated with the McMath-Pierce Solar Telescope of the National Solar Observatory. The spectra have been measured in the 21000-30000cm-1 region and a total of 52 vibrational bands involving vibrational levels up to ν=15 of the ground and excited states have been rotationally analyzed to provide a much improved set of spectroscopic constants. An experimental line list and calculated term values are provided. The results of the present analysis should prove useful in the identification of additional 13C14N lines in comets and cool stars, and will help in the determination of the 12C/13C abundance ratio. Description: Observations of CN now extend from the microwave to the vacuum ultraviolet spectral regions and a number of electronic transitions have been classified. Of these, the A2Π-X2Σ+ (red system) and B2Σ+-X2Σ+ (violet system) transitions have been extensively studied because of their astrophysical importance. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file suppl1.txt 102 15625 Output of the least-squares fit of the combined 13C14N data suppl2.dat 34 4982 Calculated term value in the different vibrational levels of the states
Description of file: suppl1.txt provides the output of the least-squares fit of the combined 13C14N data. The beginning of this table contains spectroscopic constants for the different vibrational levels of the B, A and X states. This is followed by the rotational assignments in the different bands. For the B-X bands, the first two columns are labelled as J and e/f parity for the excited state and the next two columns are J and e/f parity of the ground state. The fifth column lists the observed wavenumbers while the sixth column contains the observed minus calculated wavenumbers. For the A-X bands the first three columns are upper state J, e/f parity and F=1 (2Pi1/2) or 2 (2Pi3/2) components of the A state and the next two columns are J and e/f parity for the ground state. The label "J" is actually J+1/2 for all electronic states. The sixth column contains the observed wavenumbers of rotational lines and the seventh column contains corresponding observed-minus calculate wavenumbers. Byte-by-byte Description of file: suppl2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq [1,41] State number 4- 7 A4 --- System [2SIG/2PI ] 2SIGMA or 2PI (1) 9 A1 --- St [ABX] State 11- 12 I2 --- v [0,15] Vibrational level ν 14- 15 I2 --- J [1,50] Rotational level -1/2 (2) 17 A1 --- P [e/f] e/f parity level 19 I1 --- F [1/2]? For A state only (3) 21- 34 F14.8 --- Calc Calculated term value in the different vibrational levels of the state
Note (1): 2SIGMA for the violet system (B2Σ+-X2Σ+) or 2PI for the red system (A2Π-X2Σ+). Note (2): the label "J" is actually J+1/2 for all the doublet states. Note (3): For the A state, column F as follows: 1 = (2Π3/2) components 2 = (2Π1/2) components
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 08-Aug-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

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