Stellar and Planetary Characterization of the Ross 128 Exoplanetary System from APOGEE Spectra

  title={Stellar and Planetary Characterization of the Ross 128 Exoplanetary System from APOGEE Spectra},
  author={Diogo Souto and Cayman T. Unterborn and Verne V. Smith and Katia Cunha and Johanna K. Teske and Kevin R. Covey and B{\'a}rbara Rojas-Ayala and Domingo An{\'i}bal Garc{\'i}a-Hern{\'a}ndez and Keivan G. Stassun and Olga Zamora and Thomas Masseron and J. A. Johnson and Steven R. Majewski and Henrik J{\"o}nsson and Steven Gilhool and Cullen H. Blake and Felipe A. Santana},
  journal={The Astrophysical Journal Letters},
The first detailed chemical abundance analysis of the M-dwarf (M4.0) exoplanet-hosting star Ross 128 is presented here, based upon near-infrared (1.5–1.7 μm), high-resolution (R ∼ 22,500) spectra from the SDSS Apache Point Galactic Evolution Experiment survey. We determined precise atmospheric parameters Teff = 3231 ± 100 K, log g = 4.96 ± 0.11 dex and chemical abundances of eight elements (C, O, Mg, Al, K, Ca, Ti, and Fe), finding Ross 128 to have near solar metallicity ([Fe/H] = +0.03 ± 0.09… 

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