A Quantitative Comparison of Opacities Calculated Using the Distorted- Wave and $\boldsymbol{R}$-Matrix Methods

F. Delahaye, N. R. Badnell, C. P. Ballance, P. Palmeri, S. Preval, P. Quinet, C. Ramsbottom, R. T. Smyth, M. Turkington, C. J. Zeippen

Research output: Contribution to journalArticlepeer-review

Abstract

The present debate on the reliability of astrophysical opacities has reached a new climax with the recent measurements of Fe opacities on the Z-machine at the Sandia National Laboratory \citep{Bailey2015}. To understand the differences between theoretical results, on the one hand, and experiments on the other, as well as the differences among the various theoretical results, detailed comparisons are needed. Many ingredients are involved in the calculation of opacities; deconstructing the whole process and comparing the differences at each step are necessary to quantify their importance and impact on the final results. We present here such a comparison using the two main approaches to calculate the required atomic data, the $R$-Matrix and distorted-wave methods, as well as sets of configurations and coupling schemes to quantify the effects on the opacities for the $Fe\ XVII$ and $Ni\ XIV$ ions.
Original languageEnglish
JournalThe Astrophysical Journal
Publication statusAccepted - 01 Apr 2018

Keywords

  • Astrophysics - Solar and Stellar Astrophysics
  • Physics - Atomic Physics

Fingerprint

Dive into the research topics of 'A Quantitative Comparison of Opacities Calculated Using the Distorted- Wave and $\boldsymbol{R}$-Matrix Methods'. Together they form a unique fingerprint.

Cite this