UNCOVER-z12 is a high-redshift Lyman-break galaxy discovered by the James Webb Space Telescope (JWST)[1] during NIRCam imaging for the JWST Ultradeep NIRSpec and NIRCam Observations before the Epoch of Reionization (UNCOVER) project[2] in November 2023. UNCOVER-z12 is within the Abell 2744 supercluster in the constellation Sculptor.[3] It is the 8th-most distant spectroscopically confirmed galaxy ever discovered as of 2025, and is estimated to be 32.21 giga-lightyears from Earth.
Morphology
UNCOVER-z12 is a Lyman-Break galaxy. Due to the recent discovery date, not much more is known about the galaxy itself.[3]
Discovery
UNCOVER-z12 was first observed when large amounts of gravitational lensing from Abell 2744 made the galaxy visible. Abell 2744 is around 3.5 billion light-years away from the Milky Way.[4]
The gravity of Abell 2744 warps the fabric of space-time sufficiently to magnify the light of more faraway galaxies. The James Webb Space Telescope used the gravitational lensing to discover UNCOVER-z12, and further studies of deep galaxies located within Abell 2744 are currently ongoing.[4]
UNCOVER-z13
UNCOVER-z13 is a second, more far-away galaxy that was located on November 14, 2023, using the same systems.[5] It has a redshift of 13, making it the 3rd most distant object ever discovered in the observable universe.[1]
See also
References
- ↑ 1.0 1.1 Bonora, Elisabetta (2023-11-21). "Confermate due galassie lontane lontane" (in it-it). https://www.aliveuniverse.today/flash-news/spazio-astronomia/8315-due-galassie-molto-distanti.
- ↑ Cooper, Keith (2023-11-14). "James Webb Space Telescope finds 2 of the most distant galaxies ever seen" (in en). https://www.space.com/james-webb-space-telescope-distant-galaxies.
- ↑ 3.0 3.1 Wang, Bingjie; Fujimoto, Seiji; Labbé, Ivo; Furtak, Lukas J.; Miller, Tim B.; Setton, David J.; Zitrin, Adi; Atek, Hakim et al. (November 2023). "UNCOVER: Illuminating the Early Universe—JWST/NIRSpec Confirmation of z > 12 Galaxies". The Astrophysical Journal Letters 957 (2): L34. doi:10.3847/2041-8213/acfe07. ISSN 2041-8205. Bibcode: 2023ApJ...957L..34W.
- ↑ 4.0 4.1 Urrutia, Doris Elín (2024-02-20). "Meet Two of the Oldest Galaxies in the Universe" (in en). https://www.inverse.com/science/jwst-oldest-galaxies-webb-telescope.
- ↑ McCormick, Gail (November 13, 2023). "Second-most distant galaxy discovered using James Webb Space Telescope". https://science.psu.edu/news/WangLeja11-2023.
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