Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jqsrt..99..712f&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, Volume 99, Issue 1-3, p. 712-729.
Astronomy and Astrophysics
Astrophysics
16
Scientific paper
The charge state distributions of Fe, Na and F are determined in a photoionized laboratory plasma using high-resolution X-ray spectroscopy. Independent measurements of the density and radiation flux indicate the ionization parameter ξ in the plasma reaches values ξ=20 25ergcms under near steady-state conditions. A curve-of-growth analysis, which includes the effects of velocity gradients in a one-dimensional expanding plasma, fits the observed line opacities. Absorption lines are tabulated in the wavelength region 8 17Å. Initial comparisons with a number of astrophysical X-ray photoionization models show reasonable agreement.
Bailey James E.
Chung Hyun-Kung
Cuneo M. E.
Foord Mark E.
Fournier Kevin B.
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