Models of Stars, Brown Dwarfs and Exoplanets

TL;DR

This paper reviews recent advances in modeling the atmospheres of stars, brown dwarfs, and exoplanets, highlighting improvements in reproducing their observed properties and discussing upcoming observational prospects.

Contribution

It introduces a revised model atmosphere code that accurately captures the stellar to substellar transition, incorporating updated solar abundances and cloud models.

Findings

Successful reproduction of photometric and spectroscopic properties across the transition

Development of a comprehensive model atmosphere grid for various celestial objects

Enhanced understanding of atmospheric characteristics of exoplanets and brown dwarfs

Abstract

Within the next few years, GAIA and several instruments aiming at imag- ing extrasolar planets will see first light. In parallel, low mass planets are being searched around red dwarfs which offer more favourable conditions, both for radial velocity de- tection and transit studies, than solar-type stars. Authors of the model atmosphere code which has allowed the detection of water vapour in the atmosphere of Hot Jupiters re- view recent advancement in modelling the stellar to substellar transition. The revised solar oxygen abundances and cloud model allow for the first time to reproduce the pho- tometric and spectroscopic properties of this transition. Also presented are highlight results of a model atmosphere grid for stars, brown dwarfs and extrasolar planets.