Astrophysical line diagnosis requires non-linear dynamical atomic modeling

Abstract

Line intensities and oscillator strengths for the controversial 3C and 3D astrophysically relevant lines in neonlike Fe${}^{16+}$ ions are calculated. We show that, for strong x-ray sources, the modeling of the spectral lines by a peak with an area proportional to the oscillator strength is not sufficient and non-linear dynamical effects have to be taken into account. Furthermore, a large-scale configuration-interaction calculation of oscillator strengths is performed with the inclusion of higher-order electron-correlation effects. The dynamical effects give a possible resolution of discrepancies of theory and experiment found by recent measurements, which motivates the use of light-matter interaction models also valid for strong light fields in the analysis and interpretation of astrophysical and laboratory spectra.

arXiv comment5 pages, 3 figures

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• Journeys from Quantum Optics to Quantum Technology
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• Hyperfine splitting in simple ions for the search of the variation of fundamental constants
• Determination of plasma screening effects for thermonuclear reactions in laser-generated plasmas
• High-Precision Transition Energy Measurements of Neon-like Fe XVII Ions
• X-ray assisted nuclear excitation by electron capture in optical laser-generated plasmas
• Variation of the transition energies and oscillator strengths for the 3C and 3D lines of the Ne-like ions under plasma environment
• X-ray fluorescence spectrum of highly charged Fe ions driven by strong free-electron-laser fields
• Natural-linewidth measurements of the 3C and 3D soft-x-ray transitions in Ni XIX
• Non-Equilibrium Modeling of the Fe XVII 3C/3D ratio for an Intense X-ray Free Electron Laser
• High resolution X-ray spectra of the compact binary supersoft X-ray source CAL 87
• Resonance fluorescence in the resolvent operator formalism