XMM-Newton Probes the Solar Past: Coronal Abundances of Solar Analogs at Different Ages
M. Guedel, M. Audard, A. Sres, R. Wehrli, E. Behar, R. Mewe, A. J. J. Raassen, H. Magee
Abstract
We present an X-ray spectral analysis of four solar analogs with different ages and magnetic activity levels. We find largely different coronal compositions. The most active stars tend to show an ``Inverse First Ionization Potential'' (IFIP) effect, i.e., elements with low FIP are underabundant. Less active stars tend to the opposite effect, with relative overabundances of low-FIP elements. Equivalent Chandra results are presented that support these results.
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