Modeling X-ray emission from stellar coronae

Costanza Argiroffi, Donati, Argiroffi, Jardine, Gregory

Risultato della ricerca: Other

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.
Lingua originaleEnglish
Pagine600-603
Numero di pagine4
Stato di pubblicazionePublished - 2009

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Argiroffi, C., Donati, Argiroffi, Jardine, & Gregory (2009). Modeling X-ray emission from stellar coronae. 600-603.