NGC 2242 : a newly-discovered planetary nebula.
Abstract
The nebula NGC 2242 is found to be a previously unknown planetary nebula. Its emission-line fluxes and a finding chart are presented. The nebula is found to have very high ionization and high temperature (Te = 25,000K). The oxygen/hydrogen abundance ratio, derived by assuming a constant argon/oxygen ratio, is rather low (O/H = 8×10-5) and is consistent with the high-electron temperature.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- January 1987
- DOI:
- 10.1086/131951
- Bibcode:
- 1987PASP...99...27S
- Keywords:
-
- Abundance;
- Emission Spectra;
- Line Spectra;
- Planetary Nebulae;
- Electron Energy;
- Ion Production Rates;
- Radiant Flux Density;
- Astrophysics