Classifying Exoplanets with Gaussian Mixture Model

Abstract

Recently, Odrzywolek and Rafelski (arXiv:1612.03556) have found three distinct categories of exoplanets, when they are classified based on density. We first carry out a similar classification of exoplanets according to their density using the Gaussian Mixture Model, followed by information theoretic criterion (AIC and BIC) to determine the optimum number of components. Such a one-dimensional classification favors two components using AIC and three using BIC, but the statistical significance from both the tests is not significant enough to decisively pick the best model between two and three components. We then extend this GMM-based classification to two dimensions by using both the density and the Earth similarity index (arXiv:1702.03678), which is a measure of how similar each planet is compared to the Earth. For this two-dimensional classification, both AIC and BIC provide decisive evidence in favor of three components.

8 pages, 7 figures

References in corpus (8)

• Robust model comparison disfavors power law cosmology
• Classification of Gamma-Ray Burst durations using robust model-comparison techniques
• Statistical Significance of spectral lag transition in GRB 160625B
• A search for evidence of solar rotation in Super-Kamiokande solar neutrino dataset
• Statistical-likelihood Exo-Planetary Habitability Index (SEPHI)
• Classification of exoplanets according to density
• A Survey of Exoplanetary Detection Techniques
• Quantitative indexing and Tardigrade analysis of exoplanets

Cited by in corpus (5)

• Search for Lorentz Invariance Violation from stacked Gamma-Ray Burst spectral lag data
• Two Dimensional Clustering of Gamma-Ray Bursts using durations and hardness
• Advanced Aspects of the Galactic Habitability
• Classification of Pulsar Glitch Amplitudes using Extreme Deconvolution
• Classification of Pulsars using Extreme Deconvolution