The galaxy ZF-UDS-7329 (indicated by the arrow), captured by JWST NIRCAM. | JWST
Researchers used the James Webb Space Telescope (JWST) to discover his ZF-UDS-7329, an extremely massive and ancient dormant galaxy. Therefore, its very existence should be theoretically impossible. Estimated to be 11.5 billion years old, there are many much older stars (formed 1.5 billion years ago).
Astrophysics Researchers used the James Webb Space Telescope (JWST) to discover his ZF-UDS-7329, an extremely massive and ancient dormant galaxy. Therefore, its very existence should be theoretically impossible. Estimated to be 11.5 billion years old, there are many much older stars (formed 1.5 billion years ago), but theoretically there was not enough dark matter to allow them to form. It was a time when The formation of galaxies is a fundamental paradigm of the Standard Model of cosmology. According to this model, the first galaxies were formed by gravity caused by the accumulation of dark matter in the early universe. Dark matter, among other things, gathered together in the form of a halo, around which ordinary matter condensed to form the first “seeds” of galaxies (protogalaxies). About 1 to 2 billion years after the Big Bang, these species likely developed into dwarf galaxies, which then merged to form giant galaxies like ours. In other words, galaxies at the beginning of the universe typically cannot be more massive than galaxies that form much later. Ã add delete Space and Astrophysics · 3 minutes reading time ‘Impossible’ galaxy discovered by James Webb surprises scientists Its age and mass exceed the theoretical limits of the Standard Model of cosmology.
, Astrophysics Researchers used the James Webb Space Telescope (JWST) to discover his ZF-UDS-7329, an extremely massive and ancient dormant galaxy. Therefore, its very existence should be theoretically impossible. Estimated to be 11.5 billion years old, there are many much older stars (formed 1.5 billion years ago), but theoretically there was not enough dark matter to allow them to form. It was a time when The formation of galaxies is a fundamental paradigm of the Standard Model of cosmology. According to this model, the first galaxies were formed by gravity caused by the accumulation of dark matter in the early universe. Dark matter, among other things, gathered in the form of a halo, around which ordinary matter condensed to form the first “seeds” of galaxies (protogalaxies). About 1 to 2 billion years after the Big Bang, these species likely developed into dwarf galaxies, which then merged to form giant galaxies like ours. In other words, galaxies at the beginning of the universe typically cannot be more massive than galaxies that form much later. A ready-to-wear invitation to your dreams. However, very massive galaxies that are dormant (that is, no longer forming stars) and formed only 1 to 2 billion years after the Big Bang were recently discovered by the James Webb Telescope. This calls into question current theoretical models of the formation of these structures, as they would have formed 300 million to 500 million years earlier than assumed. “The presence of these extremely massive galaxies so early in the universe poses significant challenges to the standard model of cosmology,” astronomy professor Claudia Lagos said in a press release from Swinburne University of Technology, Australia. It is explained in At the International Center for Radio Astronomy Research (ICRAR) at the University of Western Australia. In fact, “galaxy formation is largely determined by the way matter is formed.”
After analyzing spectroscopic data from James Webb, researchers found that ZF-UDS-7329 is 11.5 billion years old and that there is a population of much older stars that formed 1.5 billion years ago. discovered. Before that (redshift 11) – about 13 billion years ago. According to standard cosmological models, this means that this galaxy formed without enough matter present, which is theoretically impossible. Furthermore, the number of stars suggests that there was a rapid increase in the number of births, but the increase suddenly stopped shortly after the galaxy formed.
source: https://www.nature.com/articles/s41586-024-07191-9