| タイトル | The hot subdwarf in the eclipsing binary HD 185510 |
| 著者（英） | Jeffery, C. S.; Evans, T. L.; Simon, Theodore |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1992-09-01 |
| 言語 | eng |
| 内容記述 | High-resolution spectroscopic measurements of radial velocity are employed to characterize the eclipsing binary HD 185510 in terms of masses and evolutionary status. The IUE is used to obtain the radial velocities which indicate a large mass ratio Mp/Ms of 7.45 +/- 0.15, and Teff is given at 25,000 +/- 1000 K based on Ly alpha and UV spectrophotometry. Photometric observations are used to give an orbital inclination of between 90 and 70 deg inclusive, leading to masses of 0.31-0.37 and 2.3-2.8 solar mass for the hot star and the K star, respectively. The surface gravity of HD 185510B is shown to be higher than those values for sdB stars suggesting that the object is a low-mass white dwarf that has not reached its fully degenerate configuration. The object is theorized to be a low-mass helium main-sequence star or a nascent helium degenerate in a post-Algol system. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 92A56681 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/324015 |
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