论文标题
篡夺者：全光谱的单位球形表示周期图
USuRPER: Unit-Sphere Representation PERiodogram for full spectra
论文作者
论文摘要
我们将周期图概念的扩展介绍给时间分辨光谱法。篡夺者 - 单位球形表示期刊 - 是一种新型技术，它在天文光谱分析中打开了新的视野。它可用于检测光谱形状的多种周期性变化。本质上，该技术基于将光谱表示为多维超空间中的单位向量，因此其名称。这是我们在先前论文中引入的相关期（PDC）期刊的扩展，以涉及光谱等非常高维数据。篡夺者考虑了光谱的整体形状，从而避免了将其减少到径向速度或温度等单一数量的需求。通过模拟，我们证明了其在各种类型的光谱变异性中的性能 - 单衬和双线光谱二进制恒星和脉动恒星。我们还显示了它在快速振荡AP（ROAP）恒星的实际数据上的性能。篡夺者是一种探索大型时间分辨光谱数据库的新工具，例如Gaia的Apogee，Lamost和RVS光谱。我们已经通过Python实施了篡夺者，向社区提供了一个公共GitHub存储库，以尝试并将其应用于各种光谱时间序列。
We introduce an extension of the periodogram concept to time-resolved spectroscopy. USuRPER -- Unit Sphere Representation PERiodogram -- is a novel technique which opens new horizons in the analysis of astronomical spectra. It can be used to detect a wide range of periodic variability of the spectrum shape. Essentially, the technique is based on representing spectra as unit vectors in a multidimensional hyperspace, hence its name. It is an extension of the phase-distance correlation (PDC) periodogram we had introduced in previous papers, to very high-dimensional data like spectra. USuRPER takes into account the overall shape of the spectrum, sparing the need to reduce it into a single quantity like radial velocity or temperature. Through simulations we demonstrate its performance in various types of spectroscopic variability -- single-lined and double-lined spectroscopic binary stars and pulsating stars. We also show its performance on actual data of a rapidly oscillating Ap (roAp) star. USuRPER is a new tool to explore large time-resolved spectroscopic databases, e.g. APOGEE, LAMOST and the RVS spectra of Gaia. We have made available to the community a public GitHub repository with a Python implementation of USuRPER, to experiment with it and apply it to a wide range of spectroscopic time series.
