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Published 2018 | public
Book Section - Chapter

Plasma-Environment Effects on the Atomic Structure and K Lines of He- and Li-like Oxygen Ions


In the context of black-hole accretion disks, we estimate the effects of the plasma environment on the atomic parameters associated with K-vacancy states in He- and Li-like oxygen ions. Multiconfiguration Dirac–Fock and Breit–Pauli computations have been carried out assuming a time-averaged Debye–Hückel potential for both the electron–nucleus and electron–electron interactions. Plasma effects on the ionization and excitation thresholds, transition wavelengths, and radiative emission rates are reported for O VI and O VII.

Additional Information

© 2018 Astronomical Society of the Pacific. JD is a Research Fellow of the Belgian Fund for Research Training in Industry and Agriculture (FRIA). PP and PQ are, respectively, Research Associate and Research Director of the Belgian Fund for Scientific Research (FRS-FNRS). Financial support from these organizations, as well as from the NASA Astrophysics Research and Analysis Program, grant 80NSSC17K0345, are gratefully acknowledged.

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August 19, 2023
January 14, 2024