Binary post-AGB stars and their Keplerian discs

Details Binary post-AGB stars and their Keplerian discs Binary post-AGB stars and their Keplerian discs

2006-04-07

arxiv.org/abs/astro-ph/0604172v1

Astronomy and Astrophysics

Astrophysics

to be included in the conference proceedings of the 8th Torino Workshop held in Granada

Scientific paper

In this contribution we give a progress report on our systematic study of a large sample of post-AGB stars. The sample stars were selected on the basis of their infrared colours and the selection criteria were tuned to discover objects with hot dust in the system. We started a very extensive, multi-wavelength programme which includes the analysis of our radial velocity monitoring; our optical high-resolution spectra; our groundbased N-band spectral data as well as the Spitzer full spectral scans; the broad-band SED and the high spatial-resolution interferometric experiments with the VLTI. In this contribution we highlight the main results obtained so far and argue that all systems in our sample are indeed binaries, which are surrounded by dusty Keplerian circumbinary discs. The discs play a lead role in the evolution of the systems.

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