论文标题
P Cygni Spectropolopormetry的13年：通过H $α$，周期性和椭圆度调查质量损失
13 Years of P Cygni Spectropolarimetry: Investigating Mass-loss Through H$α$, Periodicity, and Ellipticity
论文作者
论文摘要
我们报告了著名的发光蓝色变量（LBV），P Cygni的光学光谱图超过13年。 LBV是最大恒星生活中的关键过渡阶段，并且达到了任何恒星中最大的质量损失率。使用SpectroPolarimetry，我们能够了解P Cygni周围近乎偶然环境的几何形状，并获得对LBV质量损失的见解。 Using data from the HPOL and WUPPE spectropolarimeters, we estimate the interstellar polarization contribution to P Cygni's spectropolarimetric signal, analyze the variability of the polarization across the H$α$ emission line, search for periodic signals in the data, and introduce a statistical method to search for preferred position angles in deviations from spherical symmetry which is novel to astronomy.我们的数据与以前的发现一致，显示出均匀分布在恒星周围的团块中的自由电子散射。但是，这是由于H $α$线的偏振百分比和一系列先前未被发现的周期性的结构而变得复杂。
We report on over 13 years of optical and near-ultraviolet spectropolarimetric observations of the famous Luminous Blue Variable (LBV), P Cygni. LBVs are a critical transitional phase in the lives of the most massive stars, and achieve the largest mass-loss rates of any group of stars. Using spectropolarimetry, we are able to learn about the geometry of the near circumstellar environment surrounding P Cygni and gain insights into LBV mass-loss. Using data from the HPOL and WUPPE spectropolarimeters, we estimate the interstellar polarization contribution to P Cygni's spectropolarimetric signal, analyze the variability of the polarization across the H$α$ emission line, search for periodic signals in the data, and introduce a statistical method to search for preferred position angles in deviations from spherical symmetry which is novel to astronomy. Our data are consistent with previous findings, showing free-electron scattering off of clumps uniformly distributed around the star. This is complicated, however, by structure in the percent-polarization of the H$α$ line and a series of previously undetected periodicities.
