11/3/2023 0 Comments Old sun turning into a black holeThose place them at a time when the universe was only 860 million years old. Both galaxies are relatively dim and are good targets for studies of the early universe. Their host galaxies were first observed by the Subaru Telescope in Hawai’i. The quasars they observed are called J2236+0032 and J2255+0251. The image scale in light years is indicated in each panel. Credit: Ding, Onoue, Silverman et al. The zoom-out image, the quasar image, and the host galaxy image after subtracting the quasar light (from left to right). They announced their initial findings in the Jedition of the journal Nature. Those make up a puzzle facing an international team of researchers led by Xuheng Ding and John Silverman (both of the Kavli Institute for the Physics and Mathematics of the Universe). How did they get so massive so fast in the infant Universe? And, which came first? The galaxy or the black holes? In addition, those spectacular masses raise some challenging questions. (A quasar is the bright active nucleus of a galaxy thought to be powered by a supermassive black hole.) It turns out that these galaxies and their central black holes have completely different sizes in relation to each other. It’s black hole-driven quasar has 1.4 billion solar masses. One of the galaxies weighs in at a whopping 130 billion times the mass of the Sun. New images from JWST show two massive galaxies as they appeared less than a billion years after the universe began. In particular, their central supermassive black holes were behemoths. Less than a billion years later, they had already put on a lot of weight. It wasn’t long after the Big Bang that early galaxies began changing the Universe.
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