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Variability in Proto-Planetary Nebulae: V. Velocity and Light Curve Analyses of IRAS 17436+5003, 18095+2704, and 19475+3119
Bruce J. Hrivnak, Griet Van de Steene, Hans Van Winckel +2
We have obtained contemporaneous light, color, and radial velocity data for three proto-planetary nebulae (PPNe) over the years 2007 to 2015. The light and velocity curves of each…
A systematic survey of grain growth in discs around post-AGB binaries with PACS and SPIRE photometry
Karan Dsilva, Hans Van Winckel, Jacques Kluska
Post-AGB stars are the final stage of evolution of low-intermediate mass stars (M<8 Solar Masses). Those in binary systems have stable circumbinary discs. Using data from Herschel…
Orbital properties of binary post-AGB stars
Glenn-Michael Oomen, Hans Van Winckel, Onno Pols +5
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…
Spectroscopic binaries among AGB stars from HERMES/Mercator: the case of V Hya
A. Jorissen, S. Van Eck, T. Merle +1
We report on our search for spectroscopic binaries among a sample of AGB stars. Observations were carried out in the framework of the monitoring of radial velocities of (candidate)…
The perturbed sublimation rim of the dust disk around the post-AGB binary IRAS08544-4431
J. Kluska, M. Hillen, H. Van Winckel +4
Context: Post-Asymptotic Giant Branch (AGB) binaries are surrounded by stable dusty and gaseous disks similar to the ones around young stellar objects. Whereas significant effort i…
High-resolution observations of IRAS 08544-4431. Detection of a disk orbiting a post-AGB star and of a slow disk wind
V. Bujarrabal, A. Castro-Carrizo, H. Van Winckel +4
We are studying a class of binary post-AGB stars that seem to be systematically surrounded by equatorial disks and slow outflows. Although the rotating dynamics had only been well…