| タイトル | Mass Loss from the Central Star of NGC 7009 |
| 著者（英） | Sonneborn, George; Gruendl, Robert; Chu, You-Hua; Iping, Rosina; Massa, Derck |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2006-06-01 |
| 言語 | eng |
| 内容記述 | Observations of NGC 7009, including its central star HD 200516, have been obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, providing spectra covering 905-1187 A with spectral resolution of 15 kilometers per second. One observation was made with the 30x30 arcsec aperture and includes the star plus the entire nebula. A second series of observations used the 1.25x20 arcsec slit, significantly reducing the nebular 'contamination' of the stellar spectrum. This paper discusses the spectrum of the central star. A strong FUV continuum, as expected for Teff=82,000K, dominates the spectrum. The most prominent spectral feature is a very strong P-Cygni profile of O VI 1032-1038. This paper presents models of the stellar spectrum and the wind features to further refine the stellar parameters and mass loss rate. |
| NASA分類 | Astronomy |
| 権利 | Copyright |
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