SWEET-cat: The cat is still sweeter!

The catalog of Stars With ExoplanETs (SWEET-Cat) was originally introduced in 2013. Since then many more exoplanets are being  confirmed, continuously increasing the number of planet-host stars. A crucial step toward a comprehensive understanding of these worlds is the precise and homogeneous characterization of their host stars. Better spectroscopic stellar parameters along with new results from Gaia DR3 provide updated and precise parameters for the discovered planets. A new version of the catalog, whose homogeneity in the derivation of the parameters is key to unraveling star–planet connections, is available to the community.

Here we present the current status of the catalogue and show the new information that was recently added, in particular the new SWEET-Cat table can now be more easily combined with the planet properties listed both at the Extrasolar Planets Encyclopedia and at the NASA exoplanet archive to perform statistical analyses of exoplanets. We also made use of the recent GAIA eDR3 parallaxes and respective photometry to derive consistent and accurate surface gravity values for the host stars.

With the increased number of stars with homogeneous parameters we review and update the metallicity distributions of stars hosting planets with different mass regimes comparing the low-mass planets (<30M⊕) with the high-mass planets. The new data strengthen previous results showing the possible trend in the metallicity-period-mass diagram for low-mass planets.