PTPS – PLANETS AROUND EVOLVED STARS
Pennsylvania-Toruń Planet Search (PTPS) aims at detection of planets around 885 evolved stars: 515 giants, 238 subgiants and 132 dwarfs. The project is a result of collaboration of our group with prof. Alexander Wolszczan (PennState). Up to now 22 planetary systems have been detected around other stars. The research is based on observations with the Hobby-Eberly Telescope in Texas and Telescopio Nazionale Galileo in Canary Islands.
The group involves: A. Niedzielski, A. Wolszczan, M. Adamów, K. Kowalik, G. Maciejewski, B. Deka-Szymankiewicz
Planets similar to Jupiter in mass and radius and with orbital periods shorter than 10 days – so called hot Jupiters – constitute a relatively small group of planetary systems. An interesting aspect of such planets is that they are usually not observed in compact planetary systems and other nearby planets do not accompany them. The question of the occurrence rate of such planetary configurations is challenging for theories of formation and evolution of planetary systems, and remains open.