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.
|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|
|Number of pages||4|
|Publication status||Published - 25 Feb 2009|
ASJC Scopus subject areas
- Astronomy and Astrophysics