论文标题
RS CVN型耀斑星AR lacertae上的光学耀斑搜索
Optical Flare Search on the RS CVn-type flare stars AR Lacertae
论文作者
论文摘要
我们介绍了RS CVN型星AR lac上耀斑快速分光光度计的结果，其时间分辨率为34 s，光谱分辨率R $ \ sim $ 1300。观察结果于2021年7月21日至2021年7月21日至2.0 m Karl Zeiss telescope the Terskol Perserverate。在耀斑期间，在附近的Ca II H \＆k（$λ$ = 3933，3968Å）的AR LAC谱中出现了额外的发射，附近的Si IV线（$λ$ = 4089，4116Å）。这些线的变化范围为2至5 \％。我们已经通过滤波器透射曲线的数学卷积估计了光谱图的UBV幅度。发现UBV带中的耀斑幅度最高为0.8个幅度。详细的比色分析允许估算弹簧上的耀斑的重要参数：最大光及其尺寸的温度。颜色颜色$（u-b）$ - $（B-V）$图表确认，所有最大光闪烁的耀斑都像黑体一样辐射。最大光的温度最高为12000美元$ \ pm $ 300 k。根据我们的比色分析，我们估计耀斑的线性尺寸在最大光线下。耀斑的线性尺寸在最大亮度下约为恒星半径的2 \％。
We present the results of fast spectrophotometry of flares on the RS CVn-type star AR Lac with a time resolution of 34 s and a spectroscopic resolution R $\sim $ 1300. The observations were performed on July 21-22, 2021 with the 2.0 m Karl Zeiss telescope at the Terskol Observatory. During the flares, an additional emission appeared in the spectrum of AR Lac at wavelengths nearby Ca II H\&K ($λ$ = 3933, 3968 Å), nearby Si IV lines ($λ$ = 4089, 4116 Å). Variations in these lines range from 2 to 5\%. We have estimated the UBV magnitudes from spectrograms through a mathematical convolution of the spectra with the filter transmission curves. The flare amplitudes in the UBV band up to 0.8 magnitudes were discovered. A detailed colorimetric analysis has allowed important parameters of the flares on AR Lac to be estimated: the temperatures at maximum light and their sizes. The color-color $(U-B)$ - $(B-V)$ diagrams confirm that all the flares at maximum light radiate as a blackbody. The temperatures at maximum light were up to 12000 $\pm $ 300 K. Based on our colorimetric analysis, we have estimated the linear sizes of the flares at maximum light. The linear size of the flares at the maximum luminosity is approximately 2\% of the radius of the star.
