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The Fe XXII I(11.92 Å)/I(11.77 Å) Density Diagnostic

Published online by Cambridge University Press:  12 April 2016

Christopher W. Mauche ,
Duane A. Liedahl  and
Kevin B. Fournier
Christopher W. Mauche
Affiliation:
Lawrence Livermore National Laboratory, L-473, 7000 East Avenue, Livermore, CA94550
Duane A. Liedahl
Affiliation:
Lawrence Livermore National Laboratory, L-473, 7000 East Avenue, Livermore, CA94550
Kevin B. Fournier
Affiliation:
Lawrence Livermore National Laboratory, L-473, 7000 East Avenue, Livermore, CA94550

Abstract

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Using the Livermore X-ray Spectral Synthesizer, which calculates spectral models of highly charged ions based on HULLAC atomic data, we investigate the temperature, density, and photoexcitation dependence of the I(11.92 Å)/I(11.77 Å) line ratio of Fe XXII. Applied to the Chandra HETG spectrum of the intermediate polar EX Hya, we find that the electron density of its Te ≈ 12 MK plasma is orders of magnitude greater than that observed in the Sun or other late-type stars.

Type
Part 3. A. Accretion Plasma diagnostics - Observations
Information
International Astronomical Union Colloquium , Volume 190: Magnetic Cataclysmic Variables , 2004 , pp. 124 - 127
Copyright
Copyright © Astronomical Society of the Pacific 2004

References

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