Abstract In an effort to resolve the discrepancy between two earlier studies, new radial velocity and photometric data have been obtained and analyzed by Roche modelling for AB Andromedae, an overcontact W-subtype eclipsing binary. The new values for the basic data, m1 = 0.60 (3) Mʘ, m2 = 1.14 (3) Mʘ, R1 = 0.81 (1) Rʘ, R2 = 1.08 (1) Rʘ, L1 = 0.73 (6) Lʘ, and L2 = 1.02 (7) Lʘ, mostly lie close to a given set of previously reported values, but in some cases show small but significant differences. The latter may reflect the real errors in derived quantities, as opposed to estimated errors (quoted here and elsewhere), the latter of which sometimes underestimate the true values. A distance estimate of r = 116 (8) pc was obtained, in poor agreement with the Gaia value of 85.24 (26) pc. In addition, a new period analysis is presented using updated eclipse times, resulting in a new light time effect (LiTE) fit. Magnetic cycles, due to the Applegate effect, are likely present.

中文翻译：

---

AB Andromedae - 过度接触的日食双星

摘要 为了解决两项早期研究之间的差异，罗氏对 AB 仙女座（一种过度接触的 W 亚型日食双星）建模获得并分析了新的径向速度和光度数据。基础数据的新值，m1 = 0.60 (3) Mʘ, m2 = 1.14 (3) Mʘ, R1 = 0.81 (1) Rʘ, R2 = 1.08 (1) Rʘ, L1 = 0.73 (6) Lʘ, and L2 = 1.02 (7) Lʘ，大多接近于先前报告的一组给定值，但在某些情况下显示出微小但显着的差异。后者可能反映导出量的真实误差，而不是估计误差（此处和其他地方引用），后者有时会低估真实值。获得了 r = 116 (8) pc 的距离估计值，与 85.24 (26) pc 的盖亚值不一致。此外，使用更新的日食时间呈现新的周期分析，从而产生新的光时效应 (LiTE) 拟合。由于 Applegate 效应，可能存在磁循环。