未演化F型食双星BT Vulpeculae的绝对维数
太阳与恒星天体物理
2020-05-20 v1
摘要
我们报道了周期1.14天、分离型、双谱食双星BT Vul（F0+F7）的大量差分V波段测光与高分辨率光谱。我们的视向速度监测与光变曲线分析得出主星绝对质量与半径M1 = 1.5439 ± 0.0098 MSun、R1 = 1.536 ± 0.018 RSun，次星M2 = 1.2196 ± 0.0080 MSun、R2 = 1.151 ± 0.029 RSun。有效温度分别为7270 ± 150 K与6260 ± 180 K。两星均为快速自转，轨道为圆形。与MIST系列的恒星演化模型比较显示，对于[Fe/H] = +0.08与年龄350 Myr的组成，这些测定极为吻合。BT Vul的两组分非常接近零龄主序。
引用
@article{arxiv.2004.00022,
title = {Absolute dimensions of the unevolved F-type eclipsing binary BT Vulpeculae},
author = {Guillermo Torres and Claud H. Sandberg Lacy and Francis C. Fekel and Matthew W. Muterspaugh},
journal= {arXiv preprint arXiv:2004.00022},
year = {2020}
}
备注
9 pages in emulateapj format, including tables and figures. Accepted for publication in The Astrophysical Journal