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Flux-flux relation: Mg II h and k versus X-rays in dwarf M and K stars

M. Mathioudakis, J. G. Doyle

Abstract

Les flux de surface RX et des raies h et k de MgII sont presentes pour un groupe de naines M et K (dM, dMe, dK, dKe). Une etude montre que la luminosite de Mg II depend uniquement du rayon stellaire pour les etoiles actives dM/dK, ce qui n'est pas le cas pour la luminosite RX. Ceci peut indiquer une difference entre les mecanismes de chauffage de la chromosphere et ceux de la couronne

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Key concepts: Physics, Astrophysics, Flux (metallurgy), Chromosphere, Stars, Stellar atmosphere, Astronomy, Spectral line