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Transit-Depth Metallicity Correlation: A Bayesian Approach | | P. Sarkis
; C. Nehme
; | | Date: |
1 Sep 2015 | | Abstract: | A negative correlation was previously reported between the transit depth of
Kepler’s Q1-Q12 gas giant candidates and the stellar metallicity. In this
present work, we revisit this correlation to better understand the role of the
stellar metallicity in the formation of giant planets, in particular, to
investigate the effect of the metallicity on the transit depth. We selected the
82 confirmed giant planets from the cumulative catalog. This is the first large
and homogeneous sample of confirmed giant planets used to study this
correlation. Such samples are suitable to perform robust statistical analysis.
We present the first hierarchical Bayesian linear regression model to revise
this correlation. The advantages of using a Bayesian framework are to
incorporate measurement errors in the model and to quantify both the intrinsic
scatter and the uncertainties on the parameters of the model. Our statistical
analysis reveals no correlation between the transit depth of confirmed giant
planets and the stellar metallicity. | | Source: | arXiv, 1509.0201 | | Services: | Forum | Review | PDF | Favorites | |
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