SIMBAD references

2010MNRAS.406..626H - Mon. Not. R. Astron. Soc., 406, 626-633 (2010/July-3)

Binary [WR] and wels central stars of planetary nebulae.


Abstract (from CDS):

A sample of 33 [WR] and wels (weak emission-line central stars) central stars of planetary nebulae was observed in order to search for binary nuclei. One close binary system was discovered. The central star of PNG222.8-04.2 is the first [WR] star in a close binary system known, with a period of 0.63d. The fraction of close binary central stars, leading to photometrical variability, is lower among the hydrogen-poor [WR] stars and wels than among their hydrogen-rich counterparts. This may indicate larger orbital separations or an intrinsically lower binary fraction among [WR] and wels central stars. The detection of one close binary system among the [WR] stars shows that common-envelope evolution does not preclude such stars. It also shows that although a stellar merger is a possible evolutionary channel towards H-poor emission-line stars, it cannot form the only such channel, as PNG222.8-04.2 has avoided a merger.

Abstract Copyright: © 2010 NCAC Poland. Journal compilation © 2010 RAS

Journal keyword(s): planetary nebulae: general - binaries: general - planetary nebulae: individual: PNG222.8-04.2

Status at CDS:  

Simbad objects: 40

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2010MNRAS.406..626H and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact