Radial velocities of Gl 229 with HARPS

Subsequent radial velocity (RV) follow-up of the star unveiled, in 2014, an exoplanet on a 471 days orbit with a minimum mass of ~32M_{Earth}_. In 2020, a second exoplanet with a 122 days orbital period and a minimum mass of approximately 7M_{Earth}_ was reported.

With its BD, now a known binary, and two exoplanets, Gl 229 has been deemed one of the most diverse systems and has sparked discussions regarding the different formation mechanisms that could have taken place around this star. This work presents a new analysis of the publicly available Gl 229 High Accuracy Radial Velocity Planet Searcher data reduced with the line-by-line precision RV algorithm resistant to spectral outliers.