Artur Paczuski

Nicolaus Copernicus University

Session X: Poster session

Thursday 14th September 2023 12:00 – 13:00

abstract:
As big, evolved stars remain insufficiently researched in terms of spectroscopy, there are several projects focused on them, like The Penn State – Toruń Centre for Astronomy Planet Search (PTPS). Using TNG and HET telescopes, it allowed for discovery of several exoplanets and many new binary systems through radial velocity measurements. After focusing on clusters, dwarfs and giants, there were several objects not fit for any of the previous samples. I investigated those objects from a rejected sample which are located in a thin galactic disc. I will present my results obtained with the use of the DACE RV tool, which utilizes the Markov Chain Monte Carlo (MCMC) algorithm, which allows me to look for periodic changes in greater detail. I discovered one new exoplanet and three variable stars in the sample. I present their orbital parameters and describe a curious case of the newly discovered planet, which appears to be quite close to its smallest stable orbit.