It is shown that most of usually apparently single nitrogen WR stars with ring emission nebulae around them (WN + Neb) are a probable product of the evolution of a massive close binary with initial masses of components exceeding ~20 MO.


Stellar Wind Carbon Star High Space Velocity Surrounding Matter Strong Stellar Wind 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© IAU 1982

Authors and Affiliations

  • A. Tutukov
    • 1
  1. 1.Astronomical CouncilUSSR Ac. of Sci.USSR

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