2 - 3 July 2020
Common-envelope systems: progenitors, mergers and survivors
News: 8 Jan. 2020: updated list of invited speakersAims and scope
Most stars are born in binary or multiple systems, which usually interact during their lifetimes. The most extreme forms of contact are stellar mergers and common envelope events, when part of the primary stars envelope is expelled from the system. Recently recognized phenomena such as (luminous) red novae and their extragalactic analogs (known as intermediate luminosity optical transients or ILOTs) show that even low-mass stars can display spectacular outbursts in the Local Group. These merging systems had gone through the common-envelope (CE) phase, which is an essential channel for the formation of compact binary systems and some of the most energetic transients in the Universe. Despite its importance, this evolutionary phase is still poorly understood. In particular, questions such as the main progenitor channels, how the merged systems entered the common-envelope phase and properties of the outburst are far from clear. Moreover, observations show the existence of close binary systems which, according to theoretical predictions, should have inevitably merged during the common envelope phase.
chair: Tomasz Kaminski (NCAC Torun, Polish Academy of Sciences, PL),
Updated on Wed Jan 08 17:21:04 CET 2020
European Astronomical Society