Exoplanets With Earth Similarity Index (ESI) >= 0.8: Searching for Earth-like Exoplanets Using ESI With 2 Parameters
Ferry M. Simatupang

Institut Teknologi Bandung

Abstract

Currently, the number of confirmed exoplanets has reached more than five thousand exoplanets in nearly four thousand planetary systems. The existing data is not all complete, because exoplanets are detected by various methods, each of which provides certain different information. In this work, using the latest data compiled at exoplanet.eu, I try to find exoplanets that can be categorized as Earth-like exoplanets. The search for Earth-like exoplanets is carried out using the formulation of a similarity measure called the Earth Similarity Index (ESI). This ESI is a number between 0 and 1, where 0 denotes no similarity at all, and 1 is identical to Earth. The ESI formulation used is ESI with 2 parameters, namely the planet radius and host star flux received by the planet. Using ESI with 2 parameters, 15 exoplanets from 14 planetary systems were found. These exoplanets in their planetary systems are then compared with Earth in the Solar System.

Keywords: exoplanet, ESI

Topic: EARTH, ATMOSPHERIC, AND SPACE SCIENCE