Fig. 13
Chromospheric line flux ratios versus effective temperature: Left panel – Hα/Hβ, right panel – Ca ii K/Hα. Same plotting symbols as in Fig. 4. For comparison we include results for active M dwarf templates from the SDSS (blue circles; Bochanski et al. 2007), the M9 dwarf DENIS 1048-3956 (star symbol; Stelzer et al. 2012a), the PMS M dwarf AU Mic (black circle; Houdebine & Doyle 1994), the M3.5 dwarf AD Leo (black square; Mauas & Falchi 1994), and the Sun (rightward pointing arrows; Tandberg-Hanssen 1967).
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