REVEALING A UNIVERSAL PLANET–METALLICITY CORRELATION FOR PLANETS OF DIFFERENT SIZES AROUND SOLAR-TYPE STARS

@article{Wang2013REVEALINGAU,
  title={REVEALING A UNIVERSAL PLANET–METALLICITY CORRELATION FOR PLANETS OF DIFFERENT SIZES AROUND SOLAR-TYPE STARS},
  author={Ji Wang and Debra A. Fischer},
  journal={The Astronomical Journal},
  year={2013},
  volume={149}
}
The metallicity of exoplanet systems serves as a critical diagnostic of planet formation mechanisms. Previous studies have demonstrated the planet–metallicity correlation for large planets ( R P ≥ 4 R E ?> ); however, a correlation has not been found for smaller planets. With a sample of 406 Kepler objects of interest whose stellar properties are determined spectroscopically, we reveal a universal planet–metallicity correlation: not only gas-giant planets ( 3.9 R E < R P ≤ 22.0 R E ?> ) but… 

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