Jupiter and jovian (exo)-planets in Palatini $f(\bar R)$ gravity

TL;DR

This paper investigates how Palatini $f(ar R)$ gravity influences the evolution of substellar objects like Jupiter, showing that it affects key processes such as cloud fragmentation and planetary cooling, leading to differences in mass limits and cooling times.

Contribution

It introduces a model to analyze the impact of Palatini $f(ar R)$ gravity on substellar evolution, highlighting differences from standard gravity in planetary formation and cooling.

Findings

Opacity mass limit is altered in modified gravity.

Cooling time of jovian planets differs under Palatini $f(ar R)$ gravity.

Impacts on planetary formation processes are demonstrated.

Abstract

Some parts of the substellar evolution, such as fragmentation of a gaseous cloud and Jupiter-like planet's cooling, are demonstrated to be impacted by Palatini $f(\bar R)$ gravity. Using simple models describing those processes we show that the opacity mass limit as well as cooling time of jovian planets differ in modified gravity.