RX J2129 中的 SN 2022riv：基于韦布空间望远镜（JWST）和哈勃空间望远镜（HST）观测发现、光谱分类及强引力透镜 Ia 型超新星（supernova）的微引力透镜效应

本文介绍了在前景星系团（foreground galaxy cluster）RX J2129.7+0005 强引力透镜作用下发现的多重成像 Ia 型超新星 SN 2022riv。通过韦布空间望远镜（JWST）的光谱学（spectroscopy）观测，研究团队对其进行了分类，并利用光变曲线（light curve）拟合获得了该超新星最后到达图像的放大倍数。

arXiv:2604.11882v2 Announce Type: replace Abstract: The multiply imaged SN 2022riv was discovered through a search of galaxy cluster fields as part of a Hubble Space Telescope (HST) SNAP program to find highly magnified stars. The supernova (SN) was detected in the image corresponding to the longest time delay of a galaxy at redshift $z=1.522$ strongly lensed by the foreground galaxy cluster RX J2129.7+0005. Follow up James Webb Space Telescope (JWST) NIRSpec G140M and PRISM spectroscopy yields a Type Ia SN classification. Using the SALT3-NIR light-curve fitter, we obtain a cosmology-independent measurement of the magnification of $5.35\pm1.01$ for the last-to-arrive image of the SN, with multiple SALT SN spectral time-series models yielding consistent constraints. The last-to-arrive image of SN 2022riv we detect appeared adjacent to the brightest cluster galaxy (BCG) at a location with an exceptionally high stellar mass density ($\sim 1-2$ dex higher than that of SN Refsdal), where microlensing is expected to introduce a 20-50% modulation of the magnification. Analyzing six independent lens models of the cluster, we find that four predict the magnification with much greater precision ($p < 0.05$) than would be expected by random chance, given the large effect anticipated from microlensing. Five models yield magnifications