论文标题
针对选定的MV恒星建模和耀斑分析
Starspots Modelling and Flare Analysis on Selected MV Stars
论文作者
论文摘要
我们研究了GJ 1243，Yz CMI和V374 PEG的光曲线，该苔丝在存在恒星斑点和恒星耀斑的情况下观察到。主要目标之一是对斑点恒星的光曲线进行建模，以使用我们的原始贝斯曼软件来估计斑点及其参数的数量。从观测值中减去建模的光曲线，以提高耀斑检测的效率。使用我们新的专用软件战机自动检测到耀斑。我们估计在GJ 1243上存在两个斑点，平均温度约为2800 $ \，$ k和斑点在恒星表面的$ 3 \％-4 \％$之间变化，而V374 PEG上的两个斑点的平均温度约为3000美元，约为3000美元，$ k，$ K，斑点是STELLAR表面的6美元。在YZ CMI上，我们发现了两种不同的模型，用于两种光曲线，时间为一年半。其中之一是平均温度约为3000 $ \，$ k的三局模型，恒星的发现约9 $ \％$ $ \％$。第二个是一个四点型号，平均温度约为2800 $ \，$ k，发现了恒星表面的7 $ \％$。我们测试了耀斑是否在相位均匀分布，以及斑点的存在与耀斑的分布之间是否存在任何相关性。对于Yz CMI，一个位置与耀斑的分布进行了反相关，而对于GJ 1243，则显示了耀斑的非均匀分布。
We studied light curves of GJ 1243, YZ CMi, and V374 Peg, observed by TESS for the presence of stellar spots and stellar flares. One of the main goals was to model light curves of spotted stars to estimate the number of spots along with their parameters using our original BASSMAN software. The modeled light curves were subtracted from the observations to increase efficiency of flare detection. Flares were detected automatically with our new dedicated software WARPFINDER. We estimated the presence of two spots on GJ 1243 with mean temperature about 2800$\,$K and spottedness varying between $3\%-4\%$ of the stellar surface and two spots on V374 Peg with a mean temperature of about 3000$\,$K and spottedness about 6$\%$ of the stellar surface. On YZ CMi we found two different models for two light curves separated in time by one and a half year. One of them is three-spot model with mean temperature of about 3000$\,$K and spottedness of star about 9$\%$ of the stellar surface. The second is a four-spot model with mean temperature about 2800$\,$K and spottedness about 7$\%$ of the stellar surface. We tested whether the flares are distributed homogeneously in phase and if there is any correlation between the presence of spots and the distribution of flares. For YZ CMi one spot is in anticorrelation with the distribution of the flares and for GJ 1243 shows non-homogeneous distribution of flares.
