The Penn State - Toru\'n Planet Search: target characteristics and recent results

TL;DR

This paper reports on the Penn State-Toruń Planet Search focusing on intermediate-mass evolved stars, presenting recent radial velocity results and stellar parameters, aiming to understand planetary system formation and evolution around such stars.

Contribution

It provides new radial velocity data and stellar parameters for ~350 evolved stars, expanding studies of planetary systems beyond main-sequence stars.

Findings

Radial velocity analysis of ~350 giant stars.

Detailed stellar parameters obtained spectroscopically.

Future statistical analysis of planet occurrence and stellar parameters.

Abstract

More than 450 stars hosting planets are known today but only approximately 30 planetary systems were discovered around stars beyond the Main Sequence. The Penn State-Toru\'n Planet Search, putting an emphasis on extending studies of planetary system formation and evolution to intermediate-mass stars, is oriented towards the discoveries of substellar-mass companions to a large sample of evolved stars using high-precision radial velocity technique. We present the recent status of our survey and detailed characteristic for ~350 late type giant stars, i.e. the new results of radial velocity analysis and stellar fundamental parameters obtained with extensive spectroscopic method. Moreover, in the future we will make an attempt to perform the statistical study of our sample and searching the correlations between the existence of substellar objects and stellar atmospheric parameters according to previous works which investigated the planetary companion impact on the evolution of the host stars.