We 21 : A WN 8 star in a planetary nebula.
Abstract
Direct imaging, photometry, and optical and mm-spectroscopy of We 21 shows that this object is a subluminous WN 8 star with an absolute magnitude near Mv = -1.3. It is the central star of a low-excitation, possibly nitrogen-rich planetary nebula, which interacts with dense interstellar material of the inner Carina arm.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1990
- Bibcode:
- 1990A&A...231L..11D
- Keywords:
-
- Astronomical Photometry;
- Emission Spectra;
- Planetary Nebulae;
- Wolf-Rayet Stars;
- Forbidden Transitions;
- Oxygen Spectra;
- Stellar Magnitude;
- Stellar Mass Ejection;
- Ubv Spectra;
- Astronomy