2003/01/31 by Christopher W. Mauche, D. A. Liedahl, Duane A. Liedahl +5
Physics and Astronomy · #Astrophysics (astro-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Solar and Space Plasma Dynamics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0301633
4 pages including 3 encapsulated postscript figures; LaTeX format, uses newpasp.sty; to appear in the ASP Conference Series "IAU Colloquium No. 190--Magnetic Cataclysmic Variables"
arxiv created 2003/01/31 · openalex publication_date 2003/01/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 A)/I(11.77 A) 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 log ne (cm-3) = 14.3+0.7-0.5, orders of magnitude greater than that observed in the Sun or other late-type stars.