References of "Swensson, J-W"
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See detailLes spectres de treize nébuleuses planétaires et de leurs noyaux
Swings, Polydore ULg; Swensson, J.-W.

in Annales d'astrophysique (1952), 15

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 ... [more ▼]

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. [less ▲]

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