L-shell Dielectronic Satellite Transitions of Fe XVII

We have used the relativistic multi-reference Moller-Plesset perturbation theory to calculate the positions of the dielectronic satellite transitions involving doubly excited 3l3l' configurations that are associated with the X-ray spectrum of Fe XVII. A comparison of these positions with the wavelengths employed in astrophysical modeling codes shows discrepancies of up to 36 m angstrom. Inspection of the spectrum of Capella recorded with the high energy transmission grating on the Chandra X-Ray Observatory reveals several features enhanced by Fe XVI lines formed by dielectronic recombination, one of which may be of future diagnostic use as it is fairly well isolated and in large part formed by dielectronic recombination.