Robert Jaros

Nicolaus Copernicus University

Session X: Poster session

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

abstract:
Nearly 1000 evolved stars at various evolutionary stages were monitored for radial velocity variations within the Pennsylvania-Toruń Planet Search (PTPS).
Detailed spectral analysis of Deka-Szymankiewicz et al. (2018) revealed 29 objects with intrinsic parameters either uncertain or indicating anomalies, inconsistency between derived physical parameters and their apparent evolutionary stage. Here we present the analysis results of half (15) of the 29 object sample from obtained precise radial velocity measurements made by the Hobby-Eberly Telescope (HET, Ramsey et al. 1998) and its High Resolution Spectrograph (HRS, Tull et al. 1998). The analysis ended up with three periodic signals of possible orbiting bodies. Keplerian analysis was done using a radial velocity module of Data Analysis Center for Exoplanets (DACE) web facility based at the University of Geneva.