Molecular parameters for D, E, F, and G-A band systems of the astrophysically significant molecule A1F

Franck-Condon factors and r-centroids, which are a measure of transition probabilities, have been evaluated by a numerical integration procedure for the bands of D super(1) Delta , E super(1) pi , F super(1) pi and G super(1) capital sigma super(+) - A super(1) pi systems of A1F molecule. The species has been observed in circumstellar envelopes around AGB stars and spectral studies report its presence in sunspots. The molecular parameters evaluated are necessary for studying the physical and dynamical properties of these sources.