A massive galaxy has created a rare distortion in the path of light that has traveled billions of years to reach us from a more distant galaxy.
Their image shows a massive red foreground galaxy. Around it, four blue lights are arrayed; these are duplicated images of a more distant lensed galaxy. Together, the system has been named DESI-253.2534+26.8843.
DESI-253.2534+26.8843. The objects with G designations are those at a similar distance to the source galaxy. , a framework for modeling strong gravitational lenses. This allowed them to quickly and accurately calculate the properties of the system, finding that the total magnification of the source galaxy is 10.47.
They were also able to probe the effects of a smaller foreground galaxy that has a weaker lensing effect. This information is important for probing the properties of lensed galaxies in the distant Universe. The magnification allows us to see them in greater detail, but you need a firm understanding of the precise effect the lens has on the light that travels through it. The team's work shows us that, using modeling, we can derive the properties of a gravitational lens faster than we could previously.
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