Predicted Properties of Multiple Images of the Strongly Lensed Supernova SN Refsdal
Predicted Properties of Multiple Images of the Strongly Lensed Supernova SN Refsdal
复制标题
强透镜超新星 SN Refsdal 多幅图像的预测特性
DOI：
10.1093/mnrasl/slv025
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发表时间：
2015
影响因子：
4.8
通讯作者：
Masamune Oguri
中科院分区：
文献类型：
--
作者：
Maehara;H.; Shibayama;T.; Notsu;Y.; Notsu;S.; Honda;S.; Nogami;D.; Shibata;K.;K. Yamazaki;Masamune Oguri
我们构建了一个星系团MACS J1149.6+2223的质量模型来研究SN Refsdal多幅图像的预期性质，这是Kelly等人最近报道的第一个引力透镜超新星分辨率多幅图像的例子。我们发现，最佳拟合模型总共预测了六张超新星图像，即除了观察到的四张爱因斯坦交叉超新星图像S1-S4之外，还有两张额外的图像。据预测，一张额外的图像大约出现在1700年前，而另一张额外的图像预计将在S1-S4出现后大约一年内出现，这是一个可用近期观测验证的预测。个别超新星图像的预测放大系数从最亮图像的∼18到微弱额外图像的∼4不等。用未来的观测来面对这些预测，应该会为我们提供一个前所未有的机会来改善我们对星系团质量分布的理解。
We construct a mass model of the cluster MACS J1149.6+2223 to study the expected properties of multiple images of SN Refsdal, the first example of a gravitationally lensed supernova with resolved multiple images recently reported by Kelly et al. We find that the best-fitting model predicts six supernova images in total, i.e. two extra images in addition to the observed four Einstein cross supernova images S1–S4. One extra image is predicted to have appeared about 17 years ago, whereas the other extra image is predicted to appear in about one year from the appearance of S1–S4, which is a testable prediction with near-future observations. The predicted magnification factors of individual supernova images range from ∼18 for the brightest image to ∼4 for the faint extra images. Confronting these predictions with future observations should provide an unprecedented opportunity to improve our understanding of cluster mass distributions.