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- Title
THE ROLE OF BINARITY IN WOLF-RAYET CENTRAL STARS OF PLANETARY NEBULAE.
- Authors
Miszalski, B.; Manick, R.; McBride, V.
- Abstract
Over a hundred planetary nebulae (PNe) are known to have H-deficient central stars that mimic the spectroscopic appearance of massive Wolf-Rayet stars. The formation of these low-mass Wolf- Rayet stars, denoted [WR] stars, remains poorly understood. While several binary formation scenarios have been proposed, there are too few [WR] binaries known to determine their feasibility. Out of nearly 50 post-common-envelope (post-CE) binary central stars known, only PN G222.8-04.2 ([WC7], P = 1.26 d) and NGC 5189 ([WO1], P = 4.05 d) have a [WR] component. The available data suggests that post-CE central stars with [WR] components lack main sequence companions and have a wider orbital separation than typical post-CE binaries. There is also some indirect evidence for wide binaries that could potentially lead to the discovery of more [WR] binaries.
- Subjects
WOLF-Rayet stars; PLANETARY nebulae; FEASIBILITY studies; SPECTRUM analysis; ORBITAL assembly of space vehicles
- Publication
EAS Publications Series, 2015, Vol 71/72, p117
- ISSN
1633-4760
- Publication type
Article
- DOI
10.1051/eas/1571024