Stellar Coronae with \textit{XMM-Newton} RGS. I. Coronal Structure
Abstract
First results from high-resolution coronal spectroscopy with the {\it XMM-Newton} Reflection Grating Spectrometers (RGS) are reviewed. Five stellar systems (HR 1099, Capella, Procyon, YY Gem, AB Dor) have been observed. The emphasis of the present paper is on overall coronal structure. Elemental abundances in {\it active stars} are found to be `anomalous' in the sense that they tend to increase with increasing First Ionization Potential (FIP - i.e., signifying an inverse FIP effect). Coronal densities are measured at levels of a few times cm for cooler plasma, although there are indications for very high densities in the hotter plasma components.
Cite
@article{arxiv.astro-ph/0011573,
title = {Stellar Coronae with \textit{XMM-Newton} RGS. I. Coronal Structure},
author = {M. Guedel and M. Audard and A. J. den Boggende and A. C. Brinkman and J. W. den Herder and J. S. Kaastra and R. Mewe and A. J. J. Raassen and C. de Vries and E. Behar and J. Cottam and S. M. Kahn and F. B. S. Paerels and J. M. Peterson and A. P. Rasmussen and M. Sako and G. Branduardi-Raymont and I. Sakelliou and C. Erd},
journal= {arXiv preprint arXiv:astro-ph/0011573},
year = {2007}
}
Comments
To appear in Proc. of "X-ray astronomy 2000",(Palermo Sep. 2000), Eds. R. Giacconi, L. Stella, S. Serio, ASP Conf. Series, in press