Silicon monoxide
LAMDA | RADEX on-line

Energy levels, transition frequencies and Einstein A coefficients were taken from CDMS. The collisional rates are taken from Dayou & Balanca (2006) and were calculated for temperatures in the range from 10 to 300 K including energy levels up to J=26 for collisions with He. This set of rate coefficients was subsequently scaled by a factor 1.38 to represent collisions with H2. The datafiles available here include extrapolation to include energy levels up to J=40 and collisional temperatures up to 2000 K. For details on the extrapolation see Schöier et al. (2005). As of 25oct07 this set of data replaces the older collisional rate coefficients based on Turner et al. (1992).

  • References
    Dayou F., Balanca C. 2006, A&A 459, 297
    Schöier, F.L, van der Tak, F.F.S., van Dishoeck, E.F., Black, J.H. 2005, A&A 432, 369
    Turner, B.E., Chan, K, Green, S., Lubowich, D.A. 1992, ApJ, 399, 114

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