The formation and long-term evolution of circumbinary planetary systems across the H-R diagram

Session

Post MS systems

Session 3

16 Jan 2025, 14:15

Fuligno Cenacle

22. Origin of eclipsing time variations in post-common-envelope binaries

Dominik Schleicher

16/01/2025, 14:15

Eclipsing time variations in post-common-envelope binaries can be interpreted to be due to the presence of a third body (light-travel time effect) or to be a result of stellar magnetism, leading to the presence of a time-dependent quadrupole moment in the star causing time-dependent variations in the orbit period. In this talk, I will present 3D magneto-hydrodynamical simulations of stellar...

23. Observations of CBP exoplanets beyond the Main Sequence

Beuermann Klaus

16/01/2025, 14:50

24. A White Dwarf triple system in the Globular Cluster NGC6397

Stefan Dreizler

16/01/2025, 15:10

The high stellar density in globular clusters produces a variety of intriguing objects resulting from binary interactions, such as blue stragglers, cataclysmic variables, and millisecond pulsars. Binaries play a critical role in the dynamical state of the cluster, as the orbital energy stored in these systems can prevent or delay core collapse. Comparing observed and predicted binary...

25. Observations of post-AGB discs

Akke Corporaal

16/01/2025, 16:00

Both planets and discs are detected in binary systems beyond the main sequence. In particular, many post-asymptotic giant branch (post-AGB) binary systems are found to host circumbinary discs. These discs, created from the material of the evolved star during some yet poorly understood binary interaction phase, show many similarities with protoplanetary discs around pre-main sequence stars....

26. Formation of second-generation exoplanets around double white dwarfs

Sebastiano Ledda

17/01/2025, 09:30

The evolution of binaries that become double white dwarfs (DWDs) can cause the ejection of high amounts of dust and gas. This material can give rise to circumbinary discs and become the cradle of new planets, yet no studies to date have focused on the formation of circumbinary planets around DWDs. DWDs will be the main sources of gravitational waves detectable by the Laser Interferometer Space...

27. Orbital stability of circumbinary exoplanets orbiting double white dwarfs.

Arianna Nigioni

17/01/2025, 09:50

The formation and stability of planetary systems around compact binaries, such as double white dwarfs (DWDs), represent a frontier in planetary science, with implications for understanding planet formation in extreme environments. Recent theoretical studies suggest that second-generation planets can form in circumbinary discs around DWDs, potentially evolving into systems hosting sub-Neptunian...