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).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.