Modeling Stellar Parameters for High Resolution Late-M and Early-L Dwarf SDSS/APOGEE Spectra
Authors/Creators
- 1. UC San Diego
- 2. Leibniz Institute für Astrophysik, Potsdam
- 3. Carnegie Institute
- 4. Vanderbuilt University
Description
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) of the Sloan Digital Sky Survey IV has measured high resolution (R~22,500), near-infrared (1.51-1.70 µm) spectra for nearly 100,000 stars within the Milky Way Galxy [1]. While the APOGEE experiment was originally designed to research Galactic structure by targeting bright stellar populations in the disk, we have focused attention on the lesser-studied subset of faint and low-temperature late-M and early-L dwarfs, with the objective of characterizing their chemical abundances. Using spectral sythesis routines from the Starfish package [2], we report preliminary determinations of Teff, logg, and [Fe/H] for a small sample of spectra using PHOENIX models [3]. We also compare these PHOENIX fits to low-resolution data from the SpeX Prism Library [4] fitted by BT-Settl models.
Files
AAS_229_Poster.pdf
Files
(5.7 MB)
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