Modeling X-ray emission from stellar coronae

S. G. Gregory, M. Jardine, C. Argiroffi, J. -F. Donati

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

By extrapolating from observationally derived surface magnetograms of low-mass stars we construct models of their coronal magnetic fields and compare the 3D field geometry with axial multipoles. AB Dor, which has a radiative core, has a very complex field, whereas V374 Peg, which is completely convective, has a simple dipolar field. We calculate global X-ray emission measures assuming that the plasma trapped along the coronal loops is in hydrostatic equilibrium and compare the differences between assuming isothermal coronae, or by considering a loop temperature profiles. Our preliminary results suggest that the non-isothermal model works well for the complex field of AB Dor, but not for the simple field of V374 Peg.
Original languageEnglish
Title of host publicationProceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
EditorsH. C. Stemples
PublisherAmerican Institute of Physics
Pages600-603
Number of pages4
Volume1094
ISBN (Print)9780735406278
DOIs
Publication statusPublished - 25 Feb 2009

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