CDM and SIDM Interpretations of the Strong Gravitational Lensing Object JWST-ER1

Demao Kong, Daneng Yang, Hai-Bo Yu

van Dokkum et al. (arXiv:2309.07969) reported the discovery of JWST-ER1, a strong lensing object at redshift $z\approx 2$, using data from the James Webb Space Telescope. The lens m…