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arXiv 1404.6014astro-ph.CO
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放大Ia型超新星的引力透镜的探测

Detection of the Gravitational Lens Magnifying a Type Ia Supernova

Robert M. Quimby, Masamune Oguri, Anupreeta More, Surhud More, Takashi J. Moriya, Marcus C. Werner, Masayuki Tanaka, Gaston Folatelli, Melina C. Bersten, Keiich… 展开作者

Robert M. Quimby, Masamune Oguri, Anupreeta More, Surhud More, Takashi J. Moriya, Marcus C. Werner, Masayuki Tanaka, Gaston Folatelli, Melina C. Bersten, Keiichi Maeda, Ken'ichi Nomoto

摘要:

已知亮度的天体,如Ia型超新星(SNIa),可以用来测量距离。如果一个大质量物体扭曲时空形成背景SNIa的多个图像,那么直接测试宇宙膨胀也是可能的。然而,这些透镜事件必须首先与其他罕见现象区分开来。最近,一颗超新星被发现比它的距离更亮,这引起了一场争论:它是一种新型的超亮超新星还是被隐藏的引力透镜放大的正常SNIa?在这里,我们报告说,超新星消失后获得的光谱显示了前景星系的存在-这是第一个发现强烈放大SNIa的星系。我们讨论如何更多的透镜SNIa可能会发现比以前预测的。

英文摘要:

Objects of known brightness, like Type Ia supernovae (SNIa), can be used to measure distances. If a massive object warps spacetime to form multiple images of a background SNIa, a direct test of cosmic expansion is also possible. However, these lensing events must first be distinguished from other rare phenomena. Recently, a supernova was found to shine much brighter than normal for its distance, which resulted in a debate: was it a new type of superluminous supernova or a normal SNIa magnified by a hidden gravitational lens? Here we report that a spectrum obtained after the supernova faded away shows the presence of a foreground galaxy--the first found to strongly magnify a SNIa. We discuss how more lensed SNIa may be found than previously predicted.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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