We review recent works on the dynamics of circumbinary accretion, including time variability,
angular momentum transfer between the disk and the binary, and the secular evolution of …

Type Ia supernovae (SNe Ia) are important distance indicators, element factories, cosmic-ray
accelerators, kinetic-energy sources in galaxy evolution, and end points of stellar binary …

Circumbinary disks are found in a variety of astrophysical scenarios, spanning binary star
formation to accreting supermassive black hole binaries. Depending on the characteristics of …

The HERMES high-resolution spectrograph project aims at exploiting the specific potential
of small but flexible telescopes in observational astrophysics. The optimised optical design …

Astrophysicists are increasingly taking into account the effects of orbiting companions on
stellar evolution. New discoveries have underlined the role of binary star interactions in a …

We study the final stages of the common envelope (CE) evolution and find that a substantial
fraction of the ejected mass does not reach the escape velocity. To reach this conclusion we …

Planetary nebulae—the ejected envelopes of red giant stars—provide us with a history of
the last, mass-losing phases of 90% of stars initially more massive than the Sun. Here we …

Planets orbiting post-common envelope binaries provide fundamental information on planet
formation and evolution. We searched for such planets in NN Ser ab, an eclipsing short …

Binary post-asymptotic giant branch (post-AGB) stars are thought to be the products of a
strong but poorly understood interaction during the AGB phase. The aim of this contribution …

Context. Barium and S stars without technetium are red giants and are suspected of being
members of binary systems due to their overabundances in heavy elements. These …