将最小二乘反卷积推向新的水平：应用于双星
Pushing Least-Squares Deconvolution to the next level: application to binary stars
摘要：
光谱双线双星（SB 2）仍然是恒星精确和准确的基本性质的主要来源。此外，高节奏的光谱观测的日食阶段，使我们能够解决罗西特-麦克劳克林效应，其建模提供了手段，探测自旋轨道不对准的双星。在这项研究中，我们开发了LSDBinary算法，该算法能够将SB 2二进制的日食和日食光谱作为输入，并提供LSD配置文件，基于LSD的模型光谱和两个二进制组件的精确RV作为输出。我们提供了一个选项，以考虑Rossiter-McLaughlin效应在计算初始猜测LSD配置文件和组件的流量比，这样的效果可以在算法本身建模。我们提供了一个广泛的测试LSDBinary软件包模拟光谱的人工二进制。我们研究了输入光谱的信噪比、仪器的分辨能力、恒星的不确定大气参数和双星系统的轨道特性对LSD轮廓和RV的影响。我们发现，大气参数的影响可以忽略不计的形状上计算的LSD配置文件，而主要影响其全球尺度。我们的结果几乎不敏感的信噪比的输入光谱，提供他们包含足够数量的谱线，如在A型星和以后。最后，轨道倾角和组件的半径比被发现有最大的影响的LSD轮廓和RV曲线从他们提取的形状。LSDBinary算法是专门开发的，用于对SB 2日食系统进行详细的光谱研究，其轨道配置和组件的大气参数通过其他方法估计。
英文摘要：
Eclipsing, spectroscopic double-lined (SB2) binaries remain to be the prime source of precise and accurate fundamental properties of stars. Furthermore, high-cadence spectroscopic observations of the eclipse phases allow us to resolve the Rossiter-McLaughlin effect whose modelling offers the means to probe spin-orbit misalignment in binaries. In this study, we develop the LSDBinary algorithm that is capable of working with both in-eclipse and out-of-eclipse spectra of SB2 binaries as input and delivers the LSD profiles, LSD-based model spectra, and precise RVs of both binary components as output. We offer an option to account for the Rossiter-McLaughlin effect in the calculation of the initial guess LSD profiles and components' flux ratio such that the effect can be modelled within the algorithm itself. We provide an extensive test of the LSDBinary software package on simulated spectra of artificial binaries. We study the effects of signal-to-noise-ratio of input spectra, resolving power of the instrument, uncertain atmospheric parameters of stars, and orbital properties of the binary system on the resulting LSD profiles and RVs measured from them. We find that atmospheric parameters have negligible effect on the shape of the computed LSD profiles while affecting mostly their global scaling. Our results are barely sensitive to signal-to-noise ratio of the input spectra provided they contain sufficient number of spectral lines, such as in A-type stars and later. Finally, the orbital inclination angle and components' radii ratio are found to have the largest effect on the shapes of the LSD profiles and RV curves extracted from them. The LSDBinary algorithm is specifically developed to perform detailed spectroscopic studies of eclipsing SB2 systems whose orbital configuration and components' atmospheric parameters are estimated by other means.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
