James Webb Space Telescope Feed Post


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Date: 5/28/2023

A galaxy that formed very quickly in the early universe and at the center of which is an unexpectedly large supermassive black hole: GS-9209 is a redshift galaxy z = 4.658 (it was there and so 1.25 × 10^9 years after the big Bang).


Using data from the JWST, the authors from the paper, published in Nature, infer that the mass of the galaxy is 3, 8 (+-0.2) x 10^{10} solar massesa. It would have formed in a period of just 200 million years that began when the universe was about 800 million years old. The data indicates that in the center of GS-9209 there is a supermassive black hole of between 0.5× 10^9 and 10^9 solar masses; this is about 4 or 5 times larger than expected given the total mass of the galaxy. The news of the discovery appeared in the media these days.