| At elevated temperatures the molecules absorb and emit light in a very
complicated fashion which is hard to characterise on the basis of
laboraroty measurement. Computed line lists of molecule transitions
therefore provide a vital input for models of hot atmospheres. I will
describe the calculation and use of such line lists including the BT2
water line list [1], which contains some 500 million distinct
rotation-vibration transitions. This linelist proved crucial in the
detection of water in extrasolar planet HD189733b and has been used
extensively in atmospheric modelling. Illustrations will be given at
the meeting. A new linelist for the ammonia molecule has just been
completed [2] which shows that standard compilations for this molecule
need to be improved. Progress on a more extensive linelist for hot
ammonia and linelists for other molecules will be discussed at the
meeting.
[1] R.J. Barber, J. Tennyson, G.J. Harris and R.N. Tolchenov,
Mon. Not. R. Astr. Soc., 368, 1087-1094 (2006)
[2] S.N. Yurchenko, R.J. Barber, A. Yachmenev, W. Theil, P. Jensen and
J. Tennyson, J. Phys. Chem. A, 113, 11845-11855 (2009). |