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…
114 Citations
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References
SHOWING 1-10 OF 51 REFERENCES
Giant Planet Occurrence in the Stellar Mass-Metallicity Plane
- Physics, Geology
- 2010
Correlations between stellar properties and the occurrence rate of exoplanets can be used to inform the target selection of future planet-search efforts and provide valuable clues about the…
GIANT PLANETS ORBITING METAL-RICH STARS SHOW SIGNATURES OF PLANET–PLANET INTERACTIONS
- Geology, Physics
- 2013
Gas giants orbiting interior to the ice line are thought to have been displaced from their formation locations by processes that remain debated. Here we uncover several new metallicity trends, which…
PLANET OCCURRENCE WITHIN 0.25 AU OF SOLAR-TYPE STARS FROM KEPLER
- Physics, Geology
- 2012
We report the distribution of planets as a function of planet radius, orbital period, and stellar effective temperature for orbital periods less than 50 days around solar-type (GK) stars. These…
The Planet-Metallicity Correlation
- Physics, Geology
- 2005
We have recently carried out spectral synthesis modeling to determine Teff, log g, v sin i, and [Fe/H] for 1040 FGK-type stars on the Keck, Lick, and Anglo-Australian Telescope planet search…
THE OCCURRENCE RATE OF SMALL PLANETS AROUND SMALL STARS
- Physics, Geology
- 2013
We use the optical and near-infrared photometry from the Kepler Input Catalog to provide improved estimates of the stellar characteristics of the smallest stars in the Kepler target list. We find…
METALLICITIES OF PLANET-HOSTING STARS: A SAMPLE OF GIANTS AND SUBGIANTS
- Physics, Geology
- 2010
This work presents a homogeneous derivation of atmospheric parameters and iron abundances for a sample of giant and subgiant stars which host giant planets, as well as a control sample of subgiant…
Kepler Planet-Detection Mission: Introduction and First Results
- Physics, GeologyScience
- 2010
The planetary findings derived from the first six weeks of observations with the Kepler mission are summarized, which include the detection of five new exoplanets, which confirm the existence of planets with densities substantially lower than those predicted for gas giant planets.
Three regimes of extrasolar planet radius inferred from host star metallicities
- Geology, PhysicsNature
- 2014
The metallicities (that is, the abundances of elements heavier than hydrogen and helium) of more than 400 stars hosting 600 exoplanet candidates are reported, and it is found that the exoplanets can be categorized into three populations defined by statistically distinct metallicity regions.
Metallicity of M dwarfs - III. Planet-metallicity and planet-stellar mass correlations of the HARPS GTO M dwarf sample
- Geology, Physics
- 2013
Aims. The aim of this work is the study of the planet-metallicity and the planet-stellar mass correlations for M dwarfs from the HARPS GTO M dwarf subsample. Methods. We use a new method that takes…
TESTING THE METAL OF LATE-TYPE KEPLER PLANET HOSTS WITH IRON-CLAD METHODS
- Geology, Physics
- 2013
It has been shown that F, G, and early K dwarf hosts of Neptune-sized planets are not preferentially metal-rich. However, it is less clear whether the same holds for late K and M dwarf planet hosts.…