Planetary Dynamics and Habitable Planet Formation In Binary Star Systems

TL;DR

This paper explores how the orbital dynamics and physical properties of binary star systems influence the formation and stability of potentially habitable planets within their habitable zones.

Contribution

It provides a comprehensive analysis of planetary motion, stability, and formation processes in binary systems, highlighting conditions for habitable planet development.

Findings

Orbital stability depends on binary star parameters.

Habitable planet formation is feasible under specific dynamical conditions.

Long-term stability of habitable planets requires harmony between orbital dynamics and planet formation processes.

Abstract

Whether binaries can harbor potentially habitable planets depends on several factors including the physical properties and the orbital characteristics of the binary system. While the former determines the location of the habitable zone (HZ), the latter affects the dynamics of the material from which terrestrial planets are formed (i.e., planetesimals and planetary embryos), and drives the final architecture of the planets assembly. In order for a habitable planet to form in a binary star system, these two factors have to work in harmony. That is, the orbital dynamics of the two stars and their interactions with the planet-forming material have to allow terrestrial planet formation in the habitable zone, and ensure that the orbit of a potentially habitable planet will be stable for long times. We have organized this chapter with the same order in mind. We begin by presenting a general discussion on the motion of planets in binary stars and their stability. We then discuss the stability of terrestrial planets, and the formation of potentially habitable planets in a binary-planetary system.