Photospheric parameters and C abundances in solar-like stars with and without planets

TL;DR

This study analyzes photospheric parameters and carbon abundances in about 200 solar-like stars with and without planets, aiming to understand chemical differences related to planetary formation.

Contribution

It provides homogeneous measurements of C abundances in a large sample of solar-like stars, aiding comparison between planet-hosting and non-hosting stars.

Findings

No significant difference in C abundances between stars with and without planets

Homogeneous data set improves reliability of chemical comparison

Results contribute to understanding planetary formation processes

Abstract

We have been analyzing a large sample of solar-like stars with and without planets in order to homogeneously measure their photospheric parameters and Carbon abundances. Our sample contains around 200 stars in the solar neighborhood observed with the ELODIE spectrograph, for which the observational data are publicly available. We performed spectral synthesis of prominent bands of C$_{2}$ and C I lines, aiming to accurately obtain the C abundances. We intend to contribute homogeneous results to studies that compare elemental abundances in stars with and without known planets. New arguments will be brought forward to the discussion of possible chemical anomalies that have been suggested in the literature, leading us to a better understanding of the planetary formation process. In this work we focus on the C abundances in both stellar groups of our sample.