KIC 8462852: Will the Trojans return in 2021?
KIC 8462852: Will the Trojans return in 2021?
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KIC 8462852：特洛伊木马会在 2021 年卷土重来吗？
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
V. Martínez
中科院分区：
文献类型：
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作者：
F. Ballesteros;P. Arnalte;A. Fernández;V. Martínez
KIC 8462852在开普勒星表的10万多颗恒星中脱颖而出，因为它的光线曲线具有奇怪的特征：在D793处，一个宽的、不对称的变暗占据了15%的光线，而在大约700天后，它会出现多次窄变暗。人们提出了几个模型来解释这种异常行为，其中大多数要么需要不太可能的原因，要么需要精确调整的时间。我们的目标是提供一个相对自然的解决方案，只调用以前观察到的现象，尽管可能是更大或更大规模的版本。我们用一个巨大的环状天体来模拟这个系统，它的过境产生了第一次变暗，而一群特洛伊天体共享它的轨道，导致了第二次多次变暗。由此产生的轨道周期为$ tx12 $年，半长轴$ ax6 $ au。我们的模型允许我们做出两个直接的预测：我们预计在2021年初的几个月里，一群新的特洛伊人会在恒星前面经过，而在2023年上半年，主要物体会出现新的凌日。
KIC 8462852 stood out among more than 100,000 stars in the Kepler catalogue because of the strange features of its light curve: a wide, asymmetric dimming taking up to 15 per cent of the light at D793 and a period of multiple, narrow dimmings happening approximately 700 days later. Several models have been proposed to account for this abnormal behaviour, most of which require either unlikely causes or a finely-tuned timing. We aim at offering a relatively natural solution, invoking only phenomena that have been previously observed, although perhaps in larger or more massive versions. We model the system using a large, ringed body whose transit produces the first dimming and a swarm of Trojan objects sharing its orbit that causes the second period of multiple dimmings. The resulting orbital period is $Tapprox12$ years, with a semi-major axis $aapprox6$ au. Our model allows us to make two straightforward predictions: we expect the passage of a new swarm of Trojans in front of the star starting during the early months of 2021, and a new transit of the main object during the first half of 2023.