ON THE EVOLUTIONARY STATUS OF WR-TYPE PLANETARY-NEBULA NUCLEI

Authors
TYLENDA R GORNY SK
Citation
R. Tylenda et Sk. Gorny, ON THE EVOLUTIONARY STATUS OF WR-TYPE PLANETARY-NEBULA NUCLEI, Acta Astronomica, 43(4), 1993, pp. 389-396
Citations number
14
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Acta Astronomica → ACNP
ISSN journal
00015237
Volume
43
Issue
4
Year of publication
1993
Pages
389 - 396
Database
ISI
SICI code
0001-5237(1993)43:4<389:OTESOW>2.0.ZU;2-6
Abstract
The planetary nebula nuclei showing WR-type spectra constitute a uniqu e class of the central stars: they are He-burners. This work presents preliminary results of a study analyzing the observational characteris tics of the WR-type nuclei and their nebulae. The existing He-burning models cannot account for the observations of the WR-type nuclei. In t he discussion we consider two scenaria: (i) WR-type nuclei are single stars; (ii) WR phenomenon is an evolutionary phase of binary systems.