On the Period-Ratio-Mass-Ratio Correlation of Extra-Solar Multi-Planet Systems
Earth and Planetary Astrophysics
2021-05-26 v1
Abstract
In order to gain possible hints for planet formation from the current data of known extra-solar planets, the period-ratios and mass-ratios of adjacent planet pairs in multi-planet systems are determined. A moderate period-ratio-mass-ratio correlation is found to have a correlation coefficient r=0.5779 with 99% confidence interval (0.464, 0.672). In contrast, for non-adjacent planet pairs, the correlation coefficient is r=0.2820 with 99% confidence interval (0.133, 0.419). Our results reveal the imprint of planet-planet interactions of the adjacent planet pairs in a certain fraction of the multi-planet systems during the stage of planet formation.
Keywords
Cite
@article{arxiv.2103.12963,
title = {On the Period-Ratio-Mass-Ratio Correlation of Extra-Solar Multi-Planet Systems},
author = {Sridhar Gajendran and Li-Chin Yeh and Ing-Guey Jiang},
journal= {arXiv preprint arXiv:2103.12963},
year = {2021}
}
Comments
10 pages, 3 figures, 1 table, accepted by New Astronomy