We compute chi 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 analytic relations that describe how the chi values for the CaII H and K as well as the H-beta, H-gamma, H-delta, H-epsilon and H8 Balmer emission lines vary as a function of spectral type and color. The chi values are useful 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.
Cite
@article{arxiv.0812.1221,
title = {Chi Values for Blue Emission Lines in M Dwarfs},
author = {Andrew A. West and Suzanne L. Hawley},
journal= {arXiv preprint arXiv:0812.1221},
year = {2008}
}
Comments
9 pages, 5 figures, in November 2008 issue of PASP