| タイトル | Iron abundance in the hot DA white dwarfs Feige 24 and G191 B2B |
| 著者（英） | Bowyer, Stuart; Shipman, Harry L.; Thorstensen, John R.; Chayer, Pierre; Vennes, Stephane |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1992-06-10 |
| 言語 | eng |
| 内容記述 | Attention is given to model calculations of the far- and extreme-UV line spectra of highly ionized Fe species (Fe IV, Fe V, and Fe VI) for hot high-gravity H-rich stars. A spectral analysis of 31 hr of exposure of the DA white dwarf Feige 24 with IUE in the echelle mode reveals the presence of Fe with an abundance relative to H by number of (5-10) x 10 exp -6 with an uncertainty dominated by the determination of stellar parameters. An analysis of IUE data from the white dwarf G191 B2B results in a similar Fe abundance if this star shares similar atmospheric parameters (Teff, g) with Feige 24. Fe is thus the second most abundant photospheric element in hot DA white dwarfs. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 92A42446 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/326455 |
|
