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K-line X-ray fluorescence from highly charged iron ions under dense astrophysical plasma conditions |
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| Authors: | Jérôme Deprince Manuel Bautista Stephan Fritzsche Javier García Timothy Kallman Claudio Mendoza Patrick Palmeri Pascal Quinet |
| Institution: | 1. Physique Atomique et Astrophysique, Université de Mons, Mons, B-7000 Belgium;2. Department of Physics, Western Michigan University, Kalamazoo, 4908 MI, USA;3. Helmholtz Institut Jena, Jena, 07743 Germany
Theoretisch Physikalisches Institut, Friedrich Schiller Universität Jena, 07743 Jena, Germany;4. Department of Astronomy, California Institute of Technology, Pasadena, 91125 CA, USA;5. NASA Goddard Space Flight Center, Code 662, Greenbelt, MD, USA;6. Physique Atomique et Astrophysique, Université de Mons, Mons, B-7000 Belgium IPNAS, Université de Liège, B-4000 Liège, Belgium |
| Abstract: | In the present work, we report an investigation of plasma environment effects on the atomic parameters associated with the K-vacancy states in highly charged iron ions within the astrophysical context of accretion disks around black holes. More particularly, the sensitivity of K-line X-ray fluorescence parameters (wavelengths, radiative transition probabilities, and Auger rates) in Fe XVII–Fe XXV ions has been estimated for plasma conditions characterized by an electron temperature ranging from 105 to 107 K and an electron density ranging from 1018 to 1022 cm?3. In order to do this, relativistic multiconfiguration Dirac-Fock atomic structure calculations have been carried out by considering a time averaged Debye-Hückel potential for both the electron–nucleus and electron–electron interactions. |
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