论文标题
伽玛cas星星的苔丝灯弯曲
TESS lightcurves of gamma-Cas stars
论文作者
论文摘要
γ-CAS恒星构成了恒星的子组，显示出异常硬和明亮的X射线发射。为了寻找其他特点，我们分析了15个γ-CAS类似物的苔丝灯曲面。它们的期刊图显示了较大的频率组和/或狭窄的孤立峰，通常会叠加在红色噪声上。检测到的信号以低频出现，很少有显着信号以超过5/d的速度（所有这些信号都微弱）。信号振幅，有时甚至是频率含量会随着时间而变化，即使在没有爆发事件的情况下。根据其光学光度变异性，γ-CAS恒星没有明显的行为显示，因此通常与恒星相似。
gamma-Cas stars constitute a subgroup of Be stars showing unusually hard and bright X-ray emission. In search for additional peculiarities, we analyzed the TESS lightcurves of 15 gamma-Cas analogs. Their periodograms display broad frequency groups and/or narrow isolated peaks, often superimposed over red noise. The detected signals appear at low frequencies, with few cases of significant signals beyond 5/d (and all of them are faint). The signal amplitudes, and sometimes the frequency content, change with time, even in the absence of outburst events. On the basis of their optical photometric variability, gamma-Cas stars reveal no distinctive behaviour and thus appear similar to Be stars in general.
