SIMBAD references

We compute values for blue emission lines in active M dwarfs. Using flux-calibrated spectra from nearby M dwarfs and spectral M dwarf templates from SDSS, we derive analytical relations that describe how the values for the Ca II H and K as well as the Hβ, Hγ, Hδ, Hε, and H8 Balmer emission lines vary as a function of spectral type and color. These derived values are important for numerous M dwarf studies where the intrinsic luminosity of emission lines cannot be estimated due to uncertain distances and/or non-flux-calibrated spectra. We use these results to estimate the mean properties of blue emission lines in active-field M dwarfs from SDSS.