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J/A+A/571/A47  Extensive linelist of CH in stellar atmospheres (Masseron+, 2014)

CH in stellar atmospheres: an extensive linelist. Masseron T., Plez B., Van Eck S., Colin R., Daoutidis I., Godefroid M., Coheur P.-F., Bernath P., Jorissen A., Christlieb N. <Astron. Astrophys. 571, A47 (2014)> =2014A&A...571A..47M
ADC_Keywords: Atomic physics Keywords: molecular data - techniques: spectroscopic - stars: carbon Abstract: The advent of high-resolution spectrographs and detailed stellar atmosphere modelling has strengthened the need for accurate molecular data. Carbon-enhanced metal-poor (CEMP) stars spectra are interesting objects with which to study transitions from the CH molecule. We combine programs for spectral analysis of molecules and stellar-radiative transfer codes to build an extensive CH linelist, including predissociation broadening as well as newly identified levels. We show examples of strong predissociation CH lines in CEMP stars, and we stress the important role played by the CH features in the Bond-Neff feature depressing the spectra of barium stars by as much as 0.2∼magnitudes in the λ=3000-5500Å range. Because of the extreme thermodynamic conditions prevailing in stellar atmospheres (compared to the laboratory), molecular transitions with high energy levels can be observed. Stellar spectra can thus be used to constrain and improve molecular data. Description: Linelist for the CH molecules is presented. This includes the A-X, B-X, and C-X electronic transitions up to the last observed vibrational levels (i.e. v≥5 for the X and A states, v≥1 for the B state, and v≥2 for the C state), with rotational levels up to the dissociation energy as listed in Table 13. Concerning the 13CH linelists, for the vibrational levels that could not be observed but that exist for 12CH ( i.e. X2{Deltav=4 and 5, A2{Deltav=4 and 5, and C2{Sigma+ v=1 and 2), the Born-Oppenheimer approximation from 12CH has been used to determine the transitions. The X-X ro-vibrational transitions up to dissociation are also included for both isotopologues. The linelist is available on http://www.astro.ulb.ac.be/~spectrotools/, and will be made available through the VALD database. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table14.dat 156 102670 Linelist of the CH molecule
See also: J/MNRAS/425/34 : ExoMol line lists for BeH, MgH and CaH (Yadin+, 2012) J/MNRAS/434/1469 : ExoMol line lists for SiO (Barton+, 2013) J/MNRAS/437/1828 : ExoMol line list for HCN and HNC (Barber+, 2014) J/MNRAS/440/1649 : ExoMol line lists for CH4 (Yurchenko+, 2014) J/MNRAS/442/1821 : ExoMol line list for NaCl and KCl (Barton+, 2014) Table 13: Equilibrium constants for 12CH -------------------------------------------------------------------------------- Constant X2{PI} a3{SIGMA}- A2{DELTA} B2{SIGMA}- C2{SIGMA}+ De(cm-1) 29374.0 23349.6 16210.26 4731.57 7549.36 D00(cm-1) 27959.64 re(ÅA) 1.11981 1.0892 1.10366 1.16370 1.12777 Te 0.0 6024.40a 23148.7375 24642.425 31809.6428 ωe 2860.9238 3090.9 a 2923.3763 2255.07 2853.1724 ωexe 64.58180 102.17 a 90.2 223.2c 120.8564 ωeye 0.407275 --- -0.1917 ωeze -0.01980 --- -0.3892 Be 14.45924 15.364 b 14.88536 13.3818 14.56066 αe 0.53502 0.553b -0.591798 1.4828 0.56653 γe 0.001993 --- -0.047110 --- -0.08659 εe 0.000214 --- 0.00782 -------------------------------------------------------------------------------- Notes: a: Constants taken from Kalemos et al. (1999, Journal of Chemical Physics, 111, 9536) b: Constants taken from Lie et al. (1973, J. Chem. Phys., 59, 1887). c: value fixed according to Lie et al. (1973, J. Chem. Phys., 59, 1887) Byte-by-byte Description of file: table14.dat
Bytes Format Units Label Explanations
6- 18 F13.4 0.1nm lam.Air [2554/33376282] Wavelength of the transition in air (Å) 21- 34 E14.7 --- gf ?=-999 Oscillator strength value 39- 49 F11.5 cm-1 Elow [14/33902] Energy of the lower level 52 I1 --- vl [0/6] Vibrational quantum number of lower level 55- 58 F4.1 --- J [0.5/49.5] Rotational angular momentum quantum number of the lower level 61- 62 I2 --- Nl [0/49] Rotational angular momentum number of the lower level 64 A1 --- syml [e/f] Symmetry of the lower level 70- 80 F11.5 cm-1 Eup [2738/57430] Energy of the upper level 83 I1 --- vu [0/5] Vibrational quantum number of upper level 86- 89 F4.1 --- Ju [0.5/49.5] Rotational angular momentum number of the upper level 92- 93 I2 --- Nu [0/49] Rotational angular momentum number of the upper level 95 A1 --- symu [e/f] Symmetry of the upper level 100-111 E12.7 s-1 gamrad Radiative broadening value 113-116 A4 --- mol Molecule: 12CH or 13CH 118-120 A3 --- trans Electronic states of the transition 123 A1 --- branch Branch of the transition (P,Q or R) 125-132 F8.5 cm-1 o-c [-1.7/1.3] Difference between measurement and calculation 134-156 A23 --- Ref Reference of the measurement and comments (1)
Note (1): References are: Bembenek et al. (1997) = Bembenek et al., 1997, Journal of Molecular Spectroscopy, 183, 1 Bernath et al. (1991) = Bernath et al., 1991, Journal of Molecular Spectroscopy, 147, 16 Colin (2010) = Colin & Bernath, 2010, Journal of Molecular Spectroscopy, 263, 120 Heimer (1932) = Heimer, T. 1932, Zeitschrift fur Physik, 78, 771 Herzberg & Johns (1969) = Herzberg & Johns, 1969, ApJ, 158, 399 Kepa et al. (1996) = Kepa et al., 1996, Journal of Molecular Spectroscopy, 178, 189 Kumar et al. (1998) = Kumar et al., 1988, J. Chem. Phys., 109, 3824 Li et al. (1999) = Li & Lee, 1999, J. Chem. Phys., 111, 4942 Para et al. (1996) = Para, 1996, Journal of Physics B Atomic Molecular Physics, 29, 5765 Ubachs et al. (1996) = Ubachs et al., 1986, J. Chem. Phys., 84, 3032 Zachwieja et al. (1995) = Zachwieja, 1995, Journal of Molecular Spectroscopy, 170, 285 Zachwieja et al. (1997) = Zachwieja, 1997, Journal of Molecular Spectroscopy, 182, 18
Acknowledgements: Thomas Masseron, tpm40(at)ast.cam.ac.uk History: * 06-Nov-2014: on-line version * 16-Mar-2017: table14 corrected (from author)
(End) Patricia Vannier [CDS] 03-Oct-2014
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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