Data for: "Atomic data for astrophysics: Fe XII soft X-ray lines."

  • G. Del Zanna (Creator)
  • P. J. Storey (Creator)
  • N.R. Badnell (Creator)
  • H E Mason (Creator)

Dataset

Description

VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'Atomic data for astrophysics: Fe XII soft X-ray lines.' (bibcode: 2012A&A...543A.139D).

We present new large-scale R-matrix (up to n=4) and distorted-wave (DW, up to n=6) scattering calculations for electron collisional excitation of Fe XII. The first aim is to provide accurate atomic data for the soft X-rays, where strong decays from the n=4 levels are present. As found in previous work on Fe X, resonances attached to n=4 levels increase the cross-sections for excitations from the ground state to some n=4 levels, when compared to DW calculations. Cascading from higher levels is also important. We provide a number of models and line intensities, and list a number of strong unidentified lines. The second aim is to assess the effects of the large R-matrix calculation on the n=3 transitions. Compared to our previous (n=3) R-matrix calculation, we find overall excellent agreement to within a few percent, however a few key density diagnostic EUV intensities differ by about 60% at coronal densities. The new atomic data result in lower electron densities, resolving previous discrepancies with solar observations

The full dataset (energies, transition probabilities and rates) are available in electronic form at our APAP website (http://www.apap-network.org) as well as at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/543/A139

This site includes records provided by Elsevier's Data Monitor product. University of Strathclyde does not control or guarantee the accuracy, relevance, or completeness of the information contained in such records and accepts no responsibility or liability for such information.
Date made available21 Dec 2022
PublisherCentre de Donnees Strasbourg (CDS)

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