The Spectrum of NGC 6543 and its Nucleus.
Abstract
In the nebula NGC 6543 Bowen's i~uorescence mechanism is absent, and the re- combination process is especially efficient, giving relatively strong lines of C u, C m, and N m. The nucleus is a Woif-Rayet star showing lines of N iv and C iv of similar intensities; it is thus an object intermediate between the WN and WC sequences
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1940
- DOI:
- 10.1086/144218
- Bibcode:
- 1940ApJ....92..289S