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Binary central stars of PN discovered through photometric variability. I. What we know and what we would like to find out
Orsola De Marco, Todd C. Hillwig, A. J. Smith
Shaping axi-symmetric planetary nebulae is easier if a companion interacts with a primary at the top of the asymptotic giant branch. To determine the impact of binarity on planetar…
A close look into the carbon disk at the core of the planetary nebula CPD-568032
Olivier Chesneau, Arnaud Collioud, Orsola De Marco +7
We present high spatial resolution observations of the dusty core of the Planetary Nebula with Wolf-Rayet central star CPD-568032. These observations were taken with the mid-infrar…
V605 Aql: The Older Twin of Sakurai's Object
Geoffrey C. Clayton, F. Kerber, N. Pirzkal +3
New optical spectra have been obtained with VLT/FORS2 of the final helium shell flash (FF) star, V605 Aql, which peaked in brightness in 1919. New models suggest that this star is…
Binary central stars of planetary nebula
Orsola De Marco
Only a handful of binary central stars of planetary nebulae (PNe) are known today, due to the difficulty of detecting their companions. Preliminary results from radial velocity sur…
A Spectroscopic Analysis of Blue Stragglers, Horizontal Branch and Turn-Off Stars in Four Globular Clusters
Orsola De Marco, Michael M. Shara, D. Zurek +4
We present a spectroscopic analysis of HST/STIS and FOS low- and intermediate-resolution spectroscopy of 55 stars (turn-off stars, horizontal branch stars and blue stragglers) in f…
New insights on the complex planetary nebula Hen 2-113
Eric Lagadec, Olivier Chesneau, Mikako Matsuura +5
We report infrared observations of the planetary nebula Hen 2-113 obtained with VLT/NACO, VLTI/MIDI, VLT/ISAAC and TIMMI at the ESO 3.6m. Hen 2-113 exhibits a clear ring-like struc…