- Conference date: 15-17 November 2004
- Location: Cambridge, Massachusetts (USA)
We discuss here the observations of Fe XVIII and XIX emission lines and compare the X‐ray, EUV and FUV lines with the spectral codes widely used today (e.g. FAC and APEC). We assess the relative accuracy of these spectral models and try to identify the critical atomic data and processes. Capella with a narrow enhancement in its emission measure distribution at 6 MK provides a unique opportunity to test the Fe XVIII and Fe XIX model emissivities which peak from 6 to 8 MK. We use the summed spectra from Chandra HETG/ACIS‐S and LETG/HRC‐S, as well as contemporaneous EUVE and FUSE observations, to measure line ratios for comparison with predictions.
- Emission spectra
- Atomic spectra
- Extreme ultraviolet radiation
- Field aligned currents
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