AN O-VIII SEQUENCE FOR PLANETARY-NEBULA NUCLEI

Authors
FEIBELMAN WA
Citation
Wa. Feibelman, AN O-VIII SEQUENCE FOR PLANETARY-NEBULA NUCLEI, Publications of the Astronomical Society of the Pacific, 108(726), 1996, pp. 664-667
Citations number
21
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
108
Issue
726
Year of publication
1996
Pages
664 - 667
Database
ISI
SICI code
0004-6280(1996)108:726<664:AOSFPN>2.0.ZU;2-Q
Abstract
The detection of O vm emission lines in ultraviolet and optical spectr a of high-excitation planetary-nebula central stars suggests an ''O VI II sequence'' for these objects. Emission lines of O VII are also dete cted. Seven out of ten central stars for these planetaries are known t o be nonradial g-mode pulsators. The stars form a narrow strip when pl otted on the log L/L(.)-log T-eff H-R diagram.