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UHZ1
Background galaxy containing a quasar / From Wikipedia, the free encyclopedia
UHZ1 is a background galaxy containing a quasar. At a redshift of approximately 10.1, UHZ1 is at a distance of 13.2 billion light-years, seen when our universe was about 3 percent of its current age.[1][2] This redshift made it the most distant, and therefore earliest known quasar in the observable universe as of 2023.[3][4] To detect this object, astronomers working at the Chandra X-ray Observatory used the Abell 2744's cluster mass as a gravitational lens in order to magnify distant objects directly behind it.[5] At the time of discovery, it exceeded the distance record of QSO J0313−1806.[6]
UHZ1 | |
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Observation data (J2000 epoch) | |
Constellation | Sculptor |
Right ascension | 00h 14m 16.096s |
Declination | −30° 22′ 40.285″ |
Redshift | 10.1 |
Distance | 13.2 Gly (4.047 Gpc) (light travel distance) 31.7 Gly (9.719 Gpc) (comoving distance) |
Characteristics | |
Size | 21,000 ly (in diameter) |
The discovery of this object has led astronomers to suggest the seeds of the first quasars may have been direct-collapse black holes, from the collapse of supermassive primordial stars at the beginning of our universe.[2]