Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...508.1517d&link_type=abstract
Astronomy and Astrophysics, Volume 508, Issue 3, 2009, pp.1517-1526
Astronomy and Astrophysics
Astrophysics
17
Atomic Data, Line: Identification
Scientific paper
In the light of accurate structure and scattering calculations for Fe XVII, we review the status of identifications in the EUV spectrum of this ion using various experimental data, from the X-rays to the UV. Most previous identifications are confirmed, although a critical revision leads to changes in many wavelength values, in particular for the 2p5 3s-2p5 3p and 2p5 3p-2p5 3d transitions, which we observed with the Hinode EUV Imaging Spectrometer (EIS). Several lines are identified here for the first time. We find good agreement between expected and measured line intensities, with a few notable exceptions. In particular, the strong line in the EIS spectra, observed at 254.88 Å, has a consistently low observed intensity. We present two Hinode/EIS observations and discuss which lines are clearly blended in these datasets, and which are reliable for diagnostic purposes.
Del Zanna Giulio
Ishikawa Yasuhito
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