[en] New observational data on the spectra of thirteen planetary nebulae and their nuclei are given. New nuclei of the WOLF-RAYET type containing both nitrogen and carbon have been found. Previously adopted WOLF-RAYET designations have been modified. Nuclei of planetary nebulae, despite their occasional resemblance to WOLF-RAYET stars, should not be associated with the latter.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Swings, Polydore ; Université de Liège - ULiège > Institut d'Astrophysique de Liège
Swensson, J.-W.; Université de Liège - ULiège > Institut d'Astrophysique de Liège
Language :
French
Title :
Les spectres de treize nébuleuses planétaires et de leurs noyaux
Publication date :
1952
Journal title :
Annales d'Astrophysique
ISSN :
0365-0499
Publisher :
Caisse nationale de la recherche scientifique, Paris, France
