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Astron. Astrophys. Suppl. Ser.
Volume 119, Number 1, October_I 1996
Page(s) 105 - 110
Published online 15 October 1996
Atomic data from the Iron Project. XVI. Photoionization cross sections and oscillator strengths for Fe V DOI: 10.1051/aas:1996231

Astronomy and Astrophysics Supplement Series, Vol. 119, October I 1996, 105-110

Atomic data from the Iron Project. XVI. Photoionization cross sections and oscillator strengths for Fe V

M.A. Bautista

Department of Astronomy, The Ohio State University, 174 West 18th Avenue, Columbus, OH 43210-1106, U.S.A.

Received December 19, 1995; accepted February 15, 1996


Large scale ab initio calculations of photoionization and dipole transition probabilities for Fe V are reported. The computations were carried out in the close coupling approximation using the R-matrix method including 34 LS terms of the target ion Fe VI. All bound states of Fe V with and are considered. The results include 1816 LS bound states, dipole oscillator strengths for 129.904 LS multiplets, and detailed photoionization cross sections with extensive resonance structures for all of the bound states. These data differ significantly in many cases from the earlier data calculated under the Opacity Project and other theoretical calculations. It is expected that the new data should yield more accurate Iron opacities, particularly in objects where Fe V is observed to be one of the dominant species, such as the atmospheres of hot, young white dwarfs at temperatures of 40.000 - 60.000 K. The present calculations were mainly carried out on the massively parallel Cray T3D with a parallelized version of the Iron Project R-matrix codes.

Key words: atomic data --- plasmas --- ultraviolet general --- infrared general

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