Constraints on the Hubble constant from supernova Refsdal’s reappearance

Constraints on the Hubble constant from supernova Refsdal’s reappearance
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超新星雷夫斯达尔再现对哈勃常数的限制

DOI:
10.1126/science.abh1322
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发表时间:
2023
期刊:
影响因子:
56.9
通讯作者:
Diego, Jose M.
Diego, Jose M.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kelly, Patrick L.;Rodney, Steven;Treu, Tommaso;Oguri, Masamune;Chen, Wenlei;Zitrin, Adi;Birrer, Simon;Bonvin, Vivien;Dessart, Luc;Diego, Jose M.

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引力透镜超新星Refsdal出现在一个巨大的前景星系团通过引力透镜产生的多幅图像中。在2014年超新星出现后,星系团的透镜模型预测2015年将出现超新星的额外图像,随后被观测到。我们使用图像之间的时间延迟来执行宇宙膨胀率的盲测量,由哈勃常数(H0)量化。使用8个星团透镜模型,我们推断出H0=64.8−4.3+4.4千米每秒每百万秒差距。使用与观测最一致的两个模型,我们发现H0=66.6−3.3+4.1千米每秒每百万秒差距。通过将暗物质晕分配给单个星系和整个星系团的模型,观测结果得到了最好的再现。
The gravitationally lensed supernova Refsdal appeared in multiple images produced through gravitational lensing by a massive foreground galaxy cluster. After the supernova appeared in 2014, lens models of the galaxy cluster predicted that an additional image of the supernova would appear in 2015, which was subsequently observed. We use the time delays between the images to perform a blinded measurement of the expansion rate of the Universe, quantified by the Hubble constant (H0). Using eight cluster lens models, we infer H0=64.8−4.3+4.4 kilometers per second per megaparsec. Using the two models most consistent with the observations, we find H0=66.6−3.3+4.1 kilometers per second per megaparsec. The observations are best reproduced by models that assign dark-matter halos to individual galaxies and the overall cluster.
哈勃太空望远镜发现 MACS1149 星系团场中可能发生的焦散事件
DOI: --
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