The detailed characterisation of stars is important in many astrophysical fields. In particular, knowing with great precision the atmospheric parameters and chemical composition of planet hosting stars allows to fully characterise exoplanets and address a number of aspects, e.g. the planet-metallicity relation.
In our work, we performed a precise determination of the atmospheric parameters...
Methods to derive in a consistent way stellar abundances of low-mass stars from optical spectra are still missing. In this contribution we present a first attempt to fill this gap. Our methodology is based on the use of principal componen analysis and sparse Bayesian’s fitting methods. A set of M dwarfs in binary systems orbiting around an FGK primary was observed and is used to training our...
In questo contributo è presentato lo stato dello studio dell'attività delle stelle ospite di pianeti transitanti. Sono trattati sistemi osservati duranti GAPS1.0 e confrontati con altri sistemi transitanti e stelle di campo.
