在物理实验室模拟脉动白矮星的光度学研究
Simulating the photometric study of pulsating white dwarf stars in the physics laboratory
摘要：
我们已经设计了一个现实的模拟天文观测使用相对低成本的商业CCD相机和基于微阵列的电路，驱动发光二极管在一个不透光的盒子随时间变化的强度。作为实验室实验的一部分，学生可以使用相机获取图像序列，然后使用MATLAB或Python等语言进行数据分析，以：（a）提取成像LED的强度，（b）对时间序列数据进行基本校准，以及（c）将其数据转换为频域，然后可以识别频率结构。主要的重点是研究脉动白矮星产生的光变曲线。该练习提供了CCD观测的介绍，数字数据分析和傅立叶技术教学概念的框架，以及与白矮星物理学的联系。
英文摘要：
We have designed a realistic simulation of astronomical observing using a relatively low-cost commercial CCD camera and a microcontroller-based circuit that drives LEDs inside a light-tight box with time-varying intensities. As part of a laboratory experiment, students can acquire sequences of images using the camera, and then perform data analysis using a language such as MATLAB or Python to: (a) extract the intensity of the imaged LEDs, (b) perform basic calibrations on the time-series data, and (c) convert their data into the frequency domain where they can then identify the frequency structure. The primary focus is on studying light curves produced by the pulsating white dwarf stars. The exercise provides an introduction to CCD observing, a framework for teaching concepts in numerical data analysis and Fourier techniques, and connections with the physics of white dwarf stars.
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