| Issue |
EAS Publications Series
Volume 71-72, 2015
The Physics of Evolved Stars: A Conference Dedicated to the Memory of Olivier Chesneau
|
|
|---|---|---|
| Page(s) | 127 - 128 | |
| Section | Binaries | |
| DOI | https://doi.org/10.1051/eas/1571026 | |
| Published online | 01 December 2015 | |
The Physics of Evolved Stars: A Conference Dedicated to the Memory of Olivier Chesneau
E. Lagadec, F. Millour and T. Lanz (eds)
EAS Publications Series, 71–72 (2015) 127-128
E. Lagadec, F. Millour and T. Lanz (eds)
EAS Publications Series, 71–72 (2015) 127-128
A Radial Velocity and Light Curve Study of Pulsations and Binarity in Proto-Planetary Nebulae
1 Valparaiso University, USA
2 Royal Observatory of Belgium
3 KU Leuven, Belgium
4 Vilnius University Observatory, Lithuania
5 Dominion Astrophysical Observatory, Canada
We have investigated pulsations and searched for binarity in 7 bright proto-planetary nebulae. All are found to pulsate, with dominant periods of 39−132 days. However, no strong evidence of binarity is found in any of them. This implies that any binary companion must have either a very long period (>30 yr) or low mass (<0.2 Msun). This appears to rule out Roche lobe overflow as a contribution to the shaping of the surrounding nebula.
© EAS, EDP Sciences, 2015