论文标题
观察到的超级元素G型星的速率变化
Observed Rate Variation in Superflaring G-type Stars
论文作者
论文摘要
太阳上的耀斑发生高度可变，由于活性区域的出现和演变而表现出短期变化，以及太阳周期的长期变化。在太阳能恒星上，已经观察到了更大的恒星耀斑（超级流），并且有意思的是确定观察到的超叶状发生率是否表现出与太阳耀斑相似的变异性。我们使用来自过渡外行的调查卫星（TESS）的数据分析274颗G型星，并识别七个恒星，通过与贝叶斯块算法拟合分段恒定速率模型，这些恒星在超级荧光率发生率上表现出统计学上显着的变化（Scargle等人（Scargle et al 2012; arxiv：arxiv：1207.55578）。我们研究了这些恒星的性质及其耀斑的速率，并讨论了可检测率变化的恒星数量少的可能原因。
Flare occurrence on the Sun is highly variable, exhibiting both short term variation due to the emergence and evolution of active regions, and long-term variation from the solar cycle. On solar-like stars, much larger stellar flares (superflares) have been observed, and it is of interest to determine whether observed rates of superflare occurrence exhibit similar variability to solar flares. We analyse 274 G-type stars using data from the Transiting Exoplanet Survey Satellite (TESS) and identify seven stars which exhibit statistically significant changes in the rate of superflare occurrence by fitting a piecewise constant-rate model with the Bayesian Blocks algorithm (Scargle et al 2012; arXiv:1207.5578). We investigate the properties of these stars and their flaring rates, and discuss the possible reasons for the low number of stars with detectable rate variation.
