9 Conclusions

We presented here the missing data of the H₂-H₂CIA absorption coefficients at temperatures between 400 and 1000 K. Since the flux maximum of the black body radiation is at 3-6 $\mu$m (i.e. 3000-1700 cm^-1) for temperatures between 1000 and 500 K, especially this region should be modelled very accurately. This region corresponds, in fact, to the purely roto-translational band and to the fundamental band (see Fig. 2). These two bands were computed exactly, based on the pure theory, and rescaling has not been involved (other than that related to the interaction potential, f(T) factor). The CIA spectra of the two other bands, falling at frequencies beyond 7000 cm^-1, have been modelled by careful rescaling, as described in the previous sections. The continuous set of the 60-1000 K data presented here, together with the 1000-7000 K data presented by Borysow et al. (2001), thus represent the most accurate H₂-H₂ CIA data available. They are suitable for modelling of all types of astrophysical objects known, where CIA plays an important role - ranging all the way from planetary atmospheres, over "hot jupiters'' and brown dwarfs, to M-dwarfs and metal poor subgiants.

Acknowledgements

This work was supported by the Danish Natural Science Research Council.