X-Ray Absorption in Carbon Ions Near the K-Edge

ORAL

Abstract

K-shell photoabsorption calculations are important for determining the elemental abundances of the interstellar medium (ISM) from observed X-ray absorption spectra. Previously, we performed reliable K-shell photoabsorption calculations for oxygen [1-3] and neon [4,5] ions. We have executed detailed R-matrix calculations for carbon ions, including Auger broadening, by using an optical potential, and relaxation effects, by using pseudoorbitals with the necessary pseudoresonance elimination. This work was funded by NASA's Astronomy Physics Research and Analysis (APRA) and Solar and Heliospheric Physics (SHP) Supporting Research and Technology (SR\&T) programs. References: [1] T. W. Gorczyca and B. M. McLaughlin. J Phys. B. 33 L859 (2000) [2] A. M. Juett, et al., Astrophys. J. 612, 308 (2004) [3] J. Garcia et al., Astrophys. J. Supp. S. 158, 68 (2005) [4] T. W. Gorczyca., Phys. Rev. A. 61, 024702 (2000) [5] A. M. Juett, et al., Astrophys. J. 648, 1066 (2006)

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Authors

  • M.F. Hasoglu

    • Department of Physics, Western Michigan University, Kalamazoo, MI 49008-5252

  • Sh. A. Abdel-Naby

    • Department of Physics, Western Michigan University, Kalamazoo, MI 49008-5252

  • D. Nikolic

    • Department of Physics, Western Michigan University, Kalamazoo, MI 49008-5252

  • T.W. Gorczyca

    • Department of Physics, Western Michigan University, Kalamazoo, MI 49008-5252

  • B.M. McLaughlin

    • School of Mathematics and Physics, Queens University of Belfast, Belfast BT7 1NN, Northern Ireland, UK