A search for spectral variations of planetary nebulae and related objects
Abstract
The results of long-term spectral observations were used to search for changes in planetary nebulae and emission-line stars. A significant increase in the degree of excitation is found for two objects: M1-6 and M1-11.
- Publication:
-
Astronomical and Astrophysical Transactions
- Pub Date:
- August 2005
- DOI:
- 10.1080/10556790500483329
- arXiv:
- arXiv:astro-ph/0607167
- Bibcode:
- 2005A&AT...24..291K
- Keywords:
-
- Planetary nebulae;
- Variability of spectra;
- Astrophysics
- E-Print:
- Astron.&