论文标题
在星空互动的背景下，GJ 1151的电晕
The corona of GJ 1151 in the context of star-planet interaction
论文作者
论文摘要
据报道，低质量恒星GJ 1151显示出可变的低频无线电发射，该发射被解释为与看不见的外部球星的冠状动脉相互作用的路标。在这里，我们报告了基于XMM-Newton数据对GJ 1151的电晕的第一个X射线检测。我们发现，在X射线观察过程中，恒星显示出很小的耀斑。在观察结果上平均，我们以低冠状温度为1.6〜MK，X射线光度为$ L_X = 5.5 \ times 10^{26} $ \，ERG/s。在静止的时间段中，不包括耀斑，恒星仍未发现$ l_ {x，\，qui} \ leq 3.7 \ times 10^{26} $ \，erg/s的上限。这与该恒星观察到的无线电信号的恒星相互作用起源的最近发布模型中使用的冠状假设兼容。
The low-mass star GJ 1151 has been reported to display variable low-frequency radio emission, which has been interpreted as a signpost of coronal star-planet interactions with an unseen exoplanet. Here we report the first X-ray detection of GJ 1151's corona based on XMM-Newton data. We find that the star displays a small flare during the X-ray observation. Averaged over the observation, we detect the star with a low coronal temperature of 1.6~MK and an X-ray luminosity of $L_X = 5.5\times 10^{26}$\,erg/s. During the quiescent time periods excluding the flare, the star remains undetected with an upper limit of $L_{X,\,qui} \leq 3.7\times 10^{26}$\,erg/s. This is compatible with the coronal assumptions used in a recently published model for a star-planet interaction origin of the observed radio signals from this star.
