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Abstract

We have discovered that lensed galaxies are continuously twinkling when intersected by the Einstein rings, with over 50 microlensing events found in the Dragon and Jupiter arcs. Intriguingly, this occurs mostly along inner edge of the Einstein ring with a broad asymmetric spread. We show this assymetry requires substructure of "negative mass" that is uniquely explained by "Wave" Dark Matter interference as a Bose Einstein Condensate, whereas CDM substructure predicts the opposite behaviour with microlensing events expected mainly along outer rim of the Einstein ring. We can also discriminate between dark matter models using the "banana" effect now recognised in JWST images of high redshift galaxies, which are typically elongated in shape at z>3, in the CEERS, JADES and PEARLS surveys. Our cosmological hydro simulations show this effect can be explained by both Wave and Warm Dark Matter, where galaxies form from smooth filaments as dark matter, gas and stars rains down to the nodes creating prolate shaped galaxies. This is unlike CDM where galaxies initially form fragmented filaments that frequently merge, predicting rounder shaped oblate spheroids. We outline further definitive predictions for JWST.