论文标题
热主序列中的斑点和耀斑
Spots and flares in hot main sequence stars
论文作者
论文摘要
根据可变性类型将大约22000颗开普勒星和近60000颗苔丝星星分类。所有光谱类型的大部分恒星似乎具有与预期旋转周期一致的周期。对A和晚期恒星的先前分析强烈表明这些恒星确实是旋转变量。在本文中，我们积累了足够的数据，以表明即使在早期的B恒星中也存在旋转调制。在苔丝A和B恒星中搜索耀斑，导致在68颗恒星中发现了110张耀斑。耀斑能量超过了典型的K和M矮人的耀斑至少两个数量级。这些结果以及当前模型在A和B恒星中解释出色的脉动的严重困难，表明需要修改我们当前对具有辐射信封的恒星外层的理解。
About 22000 Kepler stars and nearly 60000 TESS stars from sectors 1-24 have been classified according to variability type. A large proportion of stars of all spectral types appear to have periods consistent with the expected rotation periods. A previous analysis of A and late B stars strongly suggests that these stars are indeed rotational variables. In this paper we have accumulated sufficient data to show that rotational modulation is present even among the early B stars. A search for flares in TESS A and B stars resulted in the detection of 110 flares in 68 stars. The flare energies exceed those of typical K and M dwarfs by at least two orders of magnitude. These results, together with severe difficulties of current models to explain stellar pulsations in A and B stars, suggest a need for revision of our current understanding of the outer layers of stars with radiative envelopes.
