SIMBAD references

2015ApJ...802L..10T - Astrophys. J., 802, L10 (2015/March-3)

M dwarf luminosity, radius, and α-enrichment from I-band spectral features.


Abstract (from CDS):

Despite the ubiquity of M dwarfs and their growing importance to studies of exoplanets, Galactic evolution, and stellar structure, methods for precisely measuring their fundamental stellar properties remain elusive. Existing techniques for measuring M dwarf luminosity, mass, radius, or composition are calibrated over a limited range of stellar parameters or require expensive observations. We find a strong correlation between the KS-band luminosity (MK), the observed strength of the I-band sodium doublet absorption feature, and [Fe/H] in M dwarfs without strong Hα emission. We show that the strength of this feature, coupled with [Fe/H] and spectral type, can be used to derive M dwarf MK and radius without requiring parallax. Additionally, we find promising evidence that the strengths of the I-band sodium doublet and the nearby I-band calcium triplet may jointly indicate α-element enrichment. The use of these I-band features requires only moderate-resolution near-infrared spectroscopy to provide valuable information about the potential habitability of exoplanets around M dwarfs, and surface gravity and distance for M dwarfs throughout the Galaxy. This technique has immediate applicability for both target selection and candidate planet-host system characterization for exoplanet missions such as TESS and K2.

Abstract Copyright:

Journal keyword(s): planets and satellites: fundamental parameters - stars: abundances - stars: activity - stars: fundamental parameters - stars: low-mass - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/802/L10): table1.dat>

Simbad objects: 348

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