Bibcode
Schmidt, S. J.; Wagoner, Erika L.; Johnson, Jennifer; Gregorio Fernandez Trincado, Jose; Robin, Annie; Reyle, Celine; Terrien, Ryan; Allende-Prieto, C.; Hearty, Fred; Majewski, Steven R.; Schiavon, Ricardo P.
Bibliographical reference
American Astronomical Society, AAS Meeting #225, #138.10
Advertised on:
1
2015
Citations
0
Refereed citations
0
Description
The Apache Point Galactic Evolution Experiment (APOGEE) has obtained
high resolution (R~22,500) near-infrared spectra of over 100,000 stars,
including a subset of ~4000 low-mass dwarfs with estimated effective
temperatures of 3500 K < Teff < 4200 K. We use data from standard
stars to confirm the accuracy of APOGEE parameters for these stars,
which sit at the low temperature, high gravity end of the APOGEE model
grid. We then cross-match these late-K and early-M dwarfs with
photometry from SDSS, 2MASS, and WISE to examine the relationships
between effective temperature, metallicity, and color for these low mass
stars. In this effective temperature regime, u-g, g-r, and W1-W2 colors
are metallicity sensitive, while r-z is a better tracer of Teff. We
compare Teff, metallicity, and colors with parameters derived from the
Padova, Dartmouth, and BT-Settl model grids, finding that while no set
of models fits exactly, each set reproduces similar general trends.