Interactions between planets and evolved stars

Shengbang Qian, Liying Zhu, Wenping Liao, Linjia Li & Zhongtao Han

Yunnan Observatories, Chinese Academy of Sciences

Searching for planetary companions to evolved stars (e.g., white dwarfs (WD) and Cataclysmic Variables (CV)) can provide insight into the interaction between planets and evolved stars as well as on the ultimate fate of planets. We have monitored decades of CVs and their progenitors including some detached white-dwarf binaries since 2006 to search for planets orbiting these systems. In my talk, I will review current observational results of circombinary planets in orbits around CVs and their progenitors. Some of our findings including planets with the shortest distances to the central evolved binaries and a few multiple planetary systems orbiting binary stars will be presented. Finally, by comparing the observational properties of planetary companions to single white dwarf and white-dwarf binaries, the interaction between planets and evolved stars and the ultimate fate of planets will be discussed.

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