Plasma environment effects on K lines of astrophysical interest: II. Ionization potentials, K thresholds, radiative rates, and Auger widths in Ne-Through He-like iron ions (Feâ XVII-Feâ XXV)
Deprince J, Bautista MA, Fritzsche S, Garcia J, Kallman T, Mendoza C, Palmeri P, Quinet P (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 626
Article Number: A83
DOI: 10.1051/0004-6361/201935444
Abstract
Aims. In the context of accretion disks around black holes, we estimate plasma-environment effects on the atomic parameters associated with the decay of K-vacancy states in highly charged iron ions, namely Feâ XVII-Feâ XXV. Methods. Within the relativistic multiconfiguration Dirac-Fock (MCDF) framework, the electron-nucleus and electron-electron plasma screenings were approximated with a time-Averaged Debye-Hückel potential. Results. Modified ionization potentials, K thresholds, wavelengths, radiative emission rates, and Auger widths are reported for astrophysical plasmas characterized by electron temperatures and densities in the ranges 105â-Â 107 K and 1018â-Â 1022 cm-3, respectively. Conclusions. We conclude that the high-resolution microcalorimeters on board future X-ray missions such as XRISM and ATHENA are expected to be sensitive to the lowering of the iron K edge due to the extreme plasma conditions occurring in accretion disks around compact objects.
Authors with CRIS profile
Involved external institutions
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
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)
United States (USA) (US)
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)
How to cite
APA:
Deprince, J., Bautista, M.A., Fritzsche, S., Garcia, J., Kallman, T., Mendoza, C.,... Quinet, P. (2019). Plasma environment effects on K lines of astrophysical interest: II. Ionization potentials, K thresholds, radiative rates, and Auger widths in Ne-Through He-like iron ions (Feâ XVII-Feâ XXV). Astronomy & Astrophysics, 626. https://doi.org/10.1051/0004-6361/201935444
MLA:
Deprince, Jerome, et al. "Plasma environment effects on K lines of astrophysical interest: II. Ionization potentials, K thresholds, radiative rates, and Auger widths in Ne-Through He-like iron ions (Feâ XVII-Feâ XXV)." Astronomy & Astrophysics 626 (2019).
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