On the evolutionary status of WR-type planetary nebula nuclei

Details On the evolutionary status of WR-type planetary nebula nuclei On the evolutionary status of WR-type planetary nebula nuclei

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aca....43..389t&link_type=abstract

Acta Astronomica, vol. 43, no. 4, p. 389-396

Astronomy and Astrophysics

Astronomy

15

Binary Stars, Planetary Nebulae, Stellar Evolution, Stellar Models, Stellar Spectra, Wolf-Rayet Stars, Helium, Stellar Temperature

Scientific paper

The planetary nebula nuclei showing Wolf-Rayet (WR)-type spectra constitute a unique class of the central stars: they are He-burners. This work presents preliminary results of a study analyzing the observational characteristics of the WR-type nuclei and their nebulae. The existing He-burning models cannot account for the observations of the WR-type nuclei. In the discussion we consider two scenaria: (i) WR-type nuclei are single stars; (ii) WR phenomenon is an evolutionary phase of binary systems.

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