Atoms, Volume 9, Issue 1 (March 2021) – 19 articles
Cover Story (view full-size image): In the context of X-ray astrophysics, we are committed in our collaborative research projects to reduce the modeling uncertainties from the underlying atomic processes and database, such that the interpretations of observed spectra are only limited by observational uncertainties. Currently, we are preparing for the forthcoming XRISM and Athena space telescopes. For the past 20 years, we have been computing atomic datasets to model the spectra of the inner-shell K lines from elements with atomic number Z ≤ 30 and, more recently, to account for high-density effects. In this figure, we fit the spectrum of the Perseus Cluster from the HITOMI collaboration with the XSTAR spectral modeling code (red line), showing that, with the higher resolution, the iconic Fe XXV “triplet” becomes a quartet leading to more reliable diagnostics of the electron temperature and density. View this paper.
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