Mass loss from the central star of NGC 3242.
Abstract
The central star of NGC 3242, which was classified to be of "continuous type" before Kudritzki et al. (1981) discovered and analysed photospheric absorptions, has been observed with IUE in high resolution. The N V resonance doublet exhibits a weak P Cygni profile with photospheric components. Theoretical profiles are obtained from comoving-frame calculations, and the nitrogen ionization balance is computed. A mass loss rate of log{M/(M_sun;yr-1)} = -10.1...-8.1 is derived, while the final wind velocity is v = 2200 km s-1. The authors compare these wind parameters with the parameters of the central star, which is probably the hottest mass-losing star studied so far, and find that the usual relations established for winds from early-type stars are fulfilled.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 1984
- Bibcode:
- 1984A&A...139..459H
- Keywords:
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- Early Stars;
- Iue;
- Planetary Nebulae;
- Stellar Mass Ejection;
- Stellar Winds;
- Spectrograms;
- Astrophysics