| タイトル | The two variables in the triple system HR 6469 = V819 Her: One eclipsing, one spotted |
| 著者（英） | Lines, Helen C.; Henry, Gregory W.; Hall, Douglas S.; Barksdale, William S.; Hargrove, Adam W.; Chang, Sandy; Green, Charles L.; Wasson, Rick; Fried, Robert E.; Van Hamme, Walter V. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1994-04-01 |
| 言語 | eng |
| 内容記述 | A complete BV light curve, from 14 nights of good data obtained with the Vanderbilt University-Tennessee State University (VU-TSU) automatic telescope, are presented and solved with the Wilson-Devinney program. Third light is evaluated, with the companion star brighter by 0.58(sup m) in V and 0.11(sup m) in B. The eclipses are partial. Inferred color indices yield F2 V and F8 V for the eclipsing pair and G8 IV-III for the distant companion star. After removing the variability due to eclipses, we study the residual variability of the G8 IV-III star over the ten years 1982 to 1992. Each yearly light curve is fit with a two-spot model. Three relatively long-lived spots are identified, with rotation periods of 85.9(sup d), 85.9(sup d), and 86.1(sup d). The weak and intermittent variability is understood because the G8 IV-III star has a Rossby number at the threshold for the onset of heavy spottedness. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 95A62424 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/310969 |
|
