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J/A+A/493/687   Rotational excitation of formaldehyde by H2       (Faure+, 2009)

Rotational excitation of formaldehyde by hydrogen molecules: ortho-H2CO at low temperature. Troscompt N., Faure A., Wiesenfeld L., Ceccarelli C., Valiron P. <Astron. Astrophys. 493, 687 (2009)> =2009A&A...493..687T
ADC_Keywords: Atomic physics Keywords: molecular data - molecular processes - ISM: molecules Abstract: Rate coefficients for the rotational excitation of the ten lowest levels of ortho-H2CO by collisions with H2 molecules are computed for kinetic temperatures in the range 5-100K. Description: Coefficients "ai" of the polynomial fit, Eq. (1) of Troscompt et al. 2009A&A...493..687T, to the rotational de-excitation rate coefficients of ortho-H2CO by para-H2 (J2=0) and ortho-H2 (J2=1). These coefficients are only valid in the temperature range 5-100 K. Eup(K) are the upper level energies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file oh2colev.dat 45 40 Rotational energy levels of ortho-H2CO in its ground vibrational state h2co_oo.dat 76 45 oH2CO-oH2 collisional fit h2co_op.dat 76 45 oH2CO-pH2 collisional fit
See also: J/A+A/472/1029 : (De)excitation rates of H2O by H2 (Faure+, 2007) J/A+A/492/257 : Collisional excitation of water in warm media (Faure+, 2008) J/MNRAS/399/425 : (De)excitation rates of ortho-NH3 and para-NH3 (Faure+, 2009) Byte-by-byte Description of file (% headlines): oh2colev.dat
Bytes Format Units Label Explanations
2- 3 I2 --- Level Level number 12- 13 I2 --- g Degeneracy of the level 21- 28 F8.4 cm-1 E Energy 36- 37 I2 --- J J quantum number 41 I1 --- Ka Ka quantum number 44- 45 I2 --- Kc Kc quantum number
Byte-by-byte Description of file (% headlines): h2co_oo.dat h2co_op.dat
Bytes Format Units Label Explanations
2 I1 --- Ju Rotational quantum number for the Upper level 4 I1 --- Kau Ka quantum number for the Upper Level 6 I1 --- Kcu Kc quantum number for the Upper Level 9 I1 --- Jl Rotational quantum number for the Lower level 11 I1 --- Kal Ka quantum number for the Lower Level 13 I1 --- Kcl Kc quantum number for the Lower Level 18- 21 F4.1 K Eup Energy of upper level 26- 32 F7.3 --- a0 order 0 coefficient of the fit 37- 44 F8.3 --- a1 order 1 coefficient of the fit 48- 55 F8.3 --- a2 order 2 coefficient of the fit 59- 66 F8.3 --- a3 order 3 coefficient of the fit 70- 76 F7.3 --- a4 order 4 coefficient of the fit
Acknowledgements: Nicolas Troscompt, Nicolas.Troscompt(at)obs.ujf-grenoble.fr History: * 15-Jan-2009: First version * 11-Jun-2009: Corrected h2co_oo.dat and h2co_op.dat files, from author
(End) Patricia Vannier [CDS] 15-Jan-2009
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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