Abstract New radial velocity and photometric data for DU Leonis have been obtained, and Roche-based simultaneous analysis of RV and light curve data for DU Leo has been accomplished for the first time, using the 2003 and 2015 versions of the Wilson-Devinney code. Values for the masses and radii have been obtained: M1 = 0.937 (5) Mʘ, M2 = 0.921 (5) Mʘ, and R1 = 1.25 (1) Rʘ, R2 = 1.21 (1) Rʘ. For the luminosities the most likely values are L1 = 1.66 (3) Lʘ and L2 = 1.50 (3) Lʘ. Both stars are at or near the end of hydrogen-burning in the cores, and are moving toward the red giant phase.

中文翻译：

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后期型分离二元 DU Leonis

摘要 获得了新的 DU Leonis 径向速度和光度数据，并使用 2003 和 2015 年版本的 Wilson-Devinney 代码，首次完成了基于 Roche 的 DU Leo RV 和光变曲线数据的同步分析。已获得质量和半径的值：M1 = 0.937 (5) Mʘ，M2 = 0.921 (5) Mʘ，R1 = 1.25 (1) Rʘ，R2 = 1.21 (1) Rʘ。对于光度，最可能的值是 L1 = 1.66 (3) Lʘ 和 L2 = 1.50 (3) Lʘ。两颗恒星都处于或接近核心的氢燃烧末期，正在向红巨星阶段移动。