Plasma environment effects on K lines of astrophysical interest: IV. IPs, K thresholds, radiative rates, and Auger widths in Fe II-Fe VIII
Deprince J, Bautista MA, Fritzsche S, Garcia J, Kallman TR, Mendoza C, Palmeri P, Quinet P (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 643
Article Number: A57
DOI: 10.1051/0004-6361/202038659
Abstract
Aims. Within the framework of compact-object accretion disks, we calculate plasma environment effects on the atomic structure and decay parameters used in the modeling of K lines in lowly charged iron ions, namely Fe II-Fe VIII. Methods. For this study, we used the fully relativistic multiconfiguration Dirac-Fock method approximating the plasma electron-nucleus and electron-electron screenings with a time-averaged Debye-Hückel potential. Results. We report modified ionization potentials, K-threshold energies, wavelengths, radiative emission rates, and Auger widths for plasmas characterized by electron temperatures and densities in the ranges 105†-†107 K and 1018†-†1022 cm-3. In addition, we propose two universal fitting formulae to predict the IP and K-threshold lowerings in any elemental ion. Conclusions. We conclude that the high-resolution X-ray spectrometers onboard the future XRISM and ATHENA space missions will be able to detect the lowering of the K edges of these Fe ions due to the extreme plasma conditions occurring in the accretion disks around compact objects.
Authors with CRIS profile
Involved external institutions
University of Mons / Université de Mons
Belgium (BE)
Western Michigan University (WMU)
United States (USA) (US)
Helmholtz-Institut Jena (HI-Jena) / Helmholtz Institute Jena
Germany (DE)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
Belgium (BE)
Western Michigan University (WMU)
United States (USA) (US)
Helmholtz-Institut Jena (HI-Jena) / Helmholtz Institute Jena
Germany (DE)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
How to cite
APA:
Deprince, J., Bautista, M.A., Fritzsche, S., Garcia, J., Kallman, T.R., Mendoza, C.,... Quinet, P. (2020). Plasma environment effects on K lines of astrophysical interest: IV. IPs, K thresholds, radiative rates, and Auger widths in Fe II-Fe VIII. Astronomy & Astrophysics, 643. https://doi.org/10.1051/0004-6361/202038659
MLA:
Deprince, Jerome, et al. "Plasma environment effects on K lines of astrophysical interest: IV. IPs, K thresholds, radiative rates, and Auger widths in Fe II-Fe VIII." Astronomy & Astrophysics 643 (2020).
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