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 language | English |
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Title of host publication | Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
Editors | H. C. Stemples |
Publisher | American Institute of Physics |
Pages | 600-603 |
Number of pages | 4 |
Volume | 1094 |
ISBN (Print) | 9780735406278 |
DOIs | |
Publication status | Published - 25 Feb 2009 |
ASJC Scopus subject areas
- Astronomy and Astrophysics