A mysterious red dot from the early universe changed its entire light signature in just thirteen days.
These objects are known as Little Red Dots and are thought to be some of the first black holes ever formed. This observation showed a massive 30 to 42 percent change in the light spectrum over a very short time. This level of rapid variability suggests we are looking directly at a chaotic disk of matter falling into a black hole. It is rare to see such ancient objects change so quickly from our perspective. This finding gives astronomers a direct look into the violent birth of the first galaxies.
The GlimmIr: Spectroscopic Variability in a z~7 LRD Indicates Rapid Changes in Both the Narrow and Broad Line Regions
arXiv · 2604.25991
The enigmatic population of ``Little Red Dots'' (LRDs) sit at the center of some of the largest debates in extragalactic astronomy today. The source(s) of ionizing emission and the physical scale over which it governs is still largely unknown. We show for the first time spectroscopic variability in a z ~ 7 LRD. Comparing a recently obtained 10.2 hr JWST/NIRSpec F290LP/G395M spectrum via the C3PO survey to an 8.4 hr F290LP/G395M spectrum taken 99 days earlier (~13 rest-days) via the THRILS survey