Light echoes from ancient supernovae in the Large Magellanic Cloud
Light echoes from ancient supernovae in the Large Magellanic Cloud
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DOI：
10.1038/nature04365
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发表时间：
2005-10
期刊：
影响因子：
64.8
通讯作者：
A. Rest;N. Suntzeff;R. C. Smith;K. Olsen;A. Zenteno;A. Becker;A. Miceli;M. Huber;K. Cook;S. Nikolaev;C. Stubbs;A. Garg;P. Challis;J. Prieto;D. Welch;A. Clocchiatti;D. Minitti;Lorenzo Morelli;G. Miknaitis
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文献类型：
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作者：
A. Rest;N. Suntzeff;R. C. Smith;K. Olsen;A. Zenteno;A. Becker;A. Miceli;M. Huber;K. Cook;S. Nikolaev;C. Stubbs;A. Garg;P. Challis;J. Prieto;D. Welch;A. Clocchiatti;D. Minitti;Lorenzo Morelli;G. Miknaitis
历史上的超新星发出的光原则上仍然可以作为散射光的回声在爆炸发生几个世纪后仍然可见。对光回波的探测可以让我们精确定位超新星事件的位置和年龄，最重要的是，可以在爆炸直接光到达地球几个世纪后获取光谱来确定超新星的“类型”。虽然已经在附近的一些河外超新星周围发现了回声，但有针对性的搜索没有在历史上的银河超新星区域发现任何回声。在这里，我们报告了三个微弱的变面亮度复合体，它们具有很高的视自行，指向之前在大麦哲伦星云中被编目的六个最小(可能是最年轻的)超新星遗迹中的三个，它们被认为是热核(Ia型)超新星。利用这些回声弧的距离和视自行，我们估计其中两个的年龄分别为610和410 年。
The light from historical supernovae could in principle still be visible as scattered-light echoes centuries after the explosion,,,,,. The detection of light echoes could allow us to pinpoint the supernova event both in position and age and, most importantly, permit the acquisition of spectra to determine the ‘type’ of the supernova centuries after the direct light from the explosion first reached Earth. Although echoes have been discovered around some nearby extragalactic supernovae,,,,,,, targeted searches have not found any echoes in the regions of historical Galactic supernovae,,. Here we report three faint variable-surface-brightness complexes with high apparent proper motions pointing back to three of the six smallest (and probably youngest) previously catalogued supernova remnants in the Large Magellanic Cloud, which are believed to have been thermonuclear (type Ia) supernovae. Using the distance and apparent proper motions of these echo arcs, we estimate ages of 610 and 410 years for two of them.