The Period-Ratio and Mass-Ratio Correlation in Extra-Solar Multiple Planetary Systems
Ing-Guey Jiang (1), Li-Chin Yeh (2), Wen-Liang Hung (2) ((1) National, Tsing Hua University, Taiwan, (2) National Hsinchu University of Education,, Taiwan)
TL;DR
This study analyzes 166 exoplanetary systems to confirm a correlation between the period-ratio and mass-ratio of neighboring planets, highlighting the influence of planet-planet interactions on system formation.
Contribution
It provides the first statistical confirmation of the correlation between period-ratio and mass-ratio in multiple exoplanet systems using observational data.
Findings
Correlation coefficient of 0.5303 with 99% confidence
Planet-planet interactions influence system formation
Synthetic simulations support observational results
Abstract
Employing the data from orbital periods and masses of extra-solar planets in 166 multiple planetary systems, the period-ratio and mass-ratio of adjacent planet pairs are studied. The correlation between the period-ratio and mass-ratio is confirmed and found to have a correlation coefficient of 0.5303 with a 99% confidence interval (0.3807, 0.6528). A comparison with the distribution of synthetic samples from a Monte Carlo simulation reveals the imprint of planet-planet interactions on the formation of adjacent planet pairs in multiple planetary systems.
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