Inversion of polarimetric data from eclipsing binaries
Inversion of polarimetric data from eclipsing binaries
复制标题
食双星偏振数据的反演
DOI：
10.1051/aas:1998261
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
J. Simmons
中科院分区：
文献类型：
--
作者：
I. Coleman;N. Gray;J. Simmons
我们描述了一种通过反转光度和偏振光曲线来确定食双星系统中恒星的临偏振和临暗度的方法。由于问题的病态性，我们使用巴科斯-吉尔伯特方法来控制恢复解的分辨率和稳定性，并对可能的最大精度进行定量估计。使用这种方法，我们确认肢体偏振确实可以恢复，并用模拟数据证明这一点，从而确定实现给定重建精度所需的观测精度水平。这使我们能够制定最佳的观测策略，并严格评估 Algol 系统中所声称的肢体极化检测。 Simmons 等人提出在恒星中使用偏振作为微透镜巡天的诊断工具。 （1995），我们讨论了这项工作扩展到扩展源的微透镜的情况。
We describe a method for determining the limb polarization and limb darkening of stars in eclipsing binary systems, by inverting photometric and polarimetric light curves. Because of the ill-conditioning of the problem, we use the Backus-Gilbert method to control the resolution and stability of the recovered solution, and to make quantita- tive estimates of the maximum accuracy possible. Using this method we conrm that the limb polarization can in- deed be recovered, and demonstrate this with simulated data, thus determining the level of observational accuracy required to achieve a given accuracy of reconstruction. This allows us to set out an optimal observational strat- egy, and to critcally assess the claimed detection of limb polarization in the Algol system. The use of polarization in stars has been proposed as a diagnostic tool in microlensing surveys by Simmons et al. (1995), and we discuss the extension of this work to the case of microlensing of extended sources.