Abstract
High-resolution 905-1187Å spectra of the central star of NGC7009 obtained with the FUSE satellite provide new constraints on the mass loss and atmosphere parameters. The most prominent spectral feature is a very strong P-Cygni profile of O VI 1032-1038. The only other wind lines are S VI 933-44 (FUSE) and N V 1238-42 and O V 1371 from IUE spectra. C IV 1548-50 and P V 1118-28 are not present, indicating that the wind is very highly ionized. A lower limit on the mass loss rate (Ṁ > 10-8M ⊙y-1, v∞ = 2450 km s-1) has been derived from an SEI analysis of these wind lines. Preliminary identification of several photospheric spectral features include several strong Fe VII and O VI lines between 1100 and 1170 Å.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 513-514 |
| Number of pages | 2 |
| Journal | Proceedings of the International Astronomical Union |
| Volume | 2 |
| Issue number | 234 |
| DOIs | |
| State | Published - Apr 2006 |
Keywords
- Planetary nebulae: individual (NGC 7009)
- Space vehicles: FUSE
- Stars: mass loss
- Techniques: spectroscopic
- Ultraviolet: stars
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Astronomy and Astrophysics
- Nutrition and Dietetics
- Public Health, Environmental and Occupational Health
- Space and Planetary Science