标题： 食双星狼微纳特双星中的光变解码 I. 光变曲线求解的非经典方法 显示英文标题

标题： Decoding of the light changes in eclipsing Wolf-Rayet binaries I. A non-classical approach to the solution of light curves

摘要： 我们提出一种技术来确定椭圆Wolf-Rayet星+O型星食双星的轨道和物理参数，其中一次食是由O型星光被W-R星恒星风吸收产生的。 我们的方法基于使用从观测光变曲线中计算出的经验矩。 视线方向上的光学深度和W-R星的边缘暗化由简单的数学函数建模，并且我们推导出光变曲线矩作为轨道参数以及透明度和边缘暗化函数的关键参数的函数。 然后对这些解析表达式进行反演，以推导轨道倾角、恒星半径、分数光度以及风透明度和边缘暗化定律的参数。 该方法应用于SMC W-R食双星HD 5980，这是一个在1994年8月经历了一次类似LBV事件的显著天体。 分析参考了爆发前的观测数据。 基于系统所得元素生成的合成光变曲线允许对所获得的结果进行质量评估。 显示英文摘要

摘要： We present a technique to determine the orbital and physical parameters of eclipsing eccentric Wolf-Rayet + O-star binaries, where one eclipse is produced by the absorption of the O-star light by the stellar wind of the W-R star. Our method is based on the use of the empirical moments of the light curve that are integral transforms evaluated from the observed light curves. The optical depth along the line of sight and the limb darkening of the W-R star are modelled by simple mathematical functions, and we derive analytical expressions for the moments of the light curve as a function of the orbital parameters and the key parameters of the transparency and limb-darkening functions. These analytical expressions are then inverted in order to derive the values of the orbital inclination, the stellar radii, the fractional luminosities, and the parameters of the wind transparency and limb-darkening laws. The method is applied to the SMC W-R eclipsing binary HD 5980, a remarkable object that underwent an LBV-like event in August 1994. The analysis refers to the pre-outburst observational data. A synthetic light curve based on the elements derived for the system allows a quality assessment of the results obtained.