见证XZ仙女座星系的眨眼
(原标题: Witness XZ Andromedae Wink)
2026-09-09
浏览次数: 1500
这颗星星在向我们眨眼吗？今天动画的中心对象不是一颗，而是两颗星星。XZ仙女座，用粗体线条表示，是从地球的角度来看，它是一个接近边缘的双星。底部的光线曲线显示了当较冷的恒星使其较热、较亮的伴星黯然失色时，系统发出的光线的数量。对仙女座星系XZ光曲线的分析表明，可能还有另外两颗恒星绕着这个系统运行。这个特殊的光线曲线是由公民天文学创建的，这是一个用于差分光度测量的开源软件。该软件获取目标星和比较星之间的亮度差异，并追踪其随时间的变化。这种技术减少了仪器和地球大气的大部分变化。除了食双星外，这种分析对研究凌日系外行星、吸积黑洞、超新星和许多更多随时间变化的天文现象也很有用。天文摄影师：用你自己的数据试试吧！
查看原文解释
Is this star winking at us? The central object in today’s animation is not one but two stars. XZ Andromedae, indicated by the bold lines, is an Algol-type eclipsing binary with a nearly edge-on orbit from Earth’s perspective. The bottom light curve shows the amount of light from the system dim and brighten as the cooler star eclipses its hotter, brighter companion. Analysis of several XZ Andromedae light curves indicates there may be two other stars orbiting the system. This particular light curve was created with Citizen Astronomy, an open-source software for differential photometry. The software takes the difference in brightness between a target and comparison star and traces its behavior over time. This technique reduces most variations from the instrument and Earth’s atmosphere. In addition to eclipsing binaries, this analysis is useful for studying transiting exoplanets, accreting black holes, supernovae, and many more time-varying astronomical phenomena. Astrophotographers: try it out on your own data!