HCO+
Formyl ion
LAMDA | RADEX on-line

Energy levels, transition frequencies and Einstein A coefficients were taken from CDMS and JPL. We have adopted the dipole moment estimated by Botschwina et al. (1993) to be 3.90 Debye. The collisional rates are taken from Flower (1999) and were calculated for temperatures in the range from 10 to 400 K including energy levels up to J=20 for collisions with H2. The datafiles available here include extrapolation to include energy levels up to J=30 and collisional temperatures up to 2000 K. For details on the extrapolation see Schöier et al. (2005).

  • References
    Botschwina,P., Horn, M., Flugge, J., Seeger, S. 1993, J. Chem. Soc. Faraday Trans., 89, 2219
    Flower, D.R. 1999, MNRAS, 305, 651
    Schöier, F.L, van der Tak, F.F.S., van Dishoeck, E.F., Black, J.H. 2005, A&A 432, 369

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