2002/04/08 by D. Porquet, R. Mewe, Porquet, D. +7
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Ionosphere and magnetosphere dynamics #Laser-induced spectroscopy and plasma #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0204119
4 pages, 3 figures, proceedings of the symposium 'New Visions of the X-ray Universe in the XMM-Newton and Chandra Era', 26-30 November 2001, ESTEC, The Netherlands, in press
arxiv created 2002/04/08 · openalex publication_date 2002/04/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The calculations of the ratios of the Helium-like ion X-ray lines from C V to Si XIII are revisited in order to apply the results to density, temperature and ionization process diagnostics of data from high-resolution spectroscopy of the new generation of X-ray satellites: Chandra and XMM-Newton. Comparing to earlier computations, Porquet & Dubau (2000), the best experimental values are used for radiative transition probabilities. The influence of an external radiation field (photo-excitation), the contribution from unresolved dielectronic satellite lines and the optical depth are taken into account. These diagnostics could be applied to collision-dominated plasmas (e.g., stellar coronae), photo-ionized plasmas (e.g., ``Warm Absorber'' in AGNs), and transient plasmas (e.g., SNRs).