Confronting atomic data with Fe L-shell spectra of stellar coronae

Details Confronting atomic data with Fe L-shell spectra of stellar coronae Confronting atomic data with Fe L-shell spectra of stellar coronae

2001-06-25

arxiv.org/abs/astro-ph/0106448v1

Astronomy and Astrophysics

Astrophysics

Submitted for the proceedings of "X-ray astronomy 2000",(Palermo Sep. 2000), Eds. R. Giacconi, L. Stella, S. Serio, ASP Conf.

Scientific paper

It is common to suggest the uncertainties in the atomic data for explaining difficulties that arise in interpreting astrophysical x-ray spectra. The atomic data for the Fe L-shell ions have, over the years, been considered particularly suspect. In this paper, we confront Fe-L spectra calculated using the HULLAC atomic code assuming coronal conditions with recent observations of the stellar coronae of Capella and HR 1099, obtained with the high-resolution grating spectrometers on board Chandra and XMM-Newton. We find very good agreement, which indicates that Fe-L transition rates calculated with state-of-the-art codes, can generally be trusted in the analysis of x-ray spectra.

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