Where are the binaries in proto-planetary nebulae? Results of a long-term radial velocity study
Abstract
We present the results of a long-term search (25 yrs) for radial velocity variability in a sample of seven bright proto-planetary nebulae showing axial symmetry. They all vary in velocity due to periodic pulsations. However, only marginal evidence is found for multi-year variations that might be due to a binary companion.
- Publication:
-
Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution
- Pub Date:
- October 2017
- DOI:
- Bibcode:
- 2017IAUS..323..218H
- Keywords:
-
- binaries: spectroscopic;
- planetary nebulae: general;
- stars: AGB and post-AGB