Evaluation of astrophysically useful parameters for HD molecule

The spectrum of HD molecule is the testing ground of both refined calculations and experimental techniques and its excited states are of considerable relevance to chemistry and astrophysics. In this study, the Franck-Condon (FC) factors and r-centroids are evaluated for the bands of d3Πu-a3Σg+, e  3Σu+-a3Σg+ and I  1Πg-B1Σu+ transitions of HD molecule. The evaluation is done by numerical integration procedure using a suitable potential. The physical and astrophysical significance of the estimated FC factors and r-centroids are also discussed.