GN-z11 superimposed on an image from the GOODS-North survey
|Observation data (J2000 epoch)|
|Right ascension||12h 36m 25.46s|
|Declination||+62° 14′ 31.4″|
|Helio radial velocity||295,050 ± 119,917 km/s (183,336 ± 74,513 mi/s)|
|Size||4,000 ± 2,000 ly (1,200 ± 610 pc)|
GN-z11 is a high-redshift galaxy found in the constellation Ursa Major. GN-z11 is currently the oldest and most distant known galaxy in the observable universe. z = 11.09, which corresponds to a proper distance of approximately 32 billion light-year s (9.8 billion parsec s).GN-z11 has a spectroscopic redshift of
The object's name is derived from its location in the GOODS-North field of galaxies and its high cosmological redshift number (GN + z11). GN-z11 is observed as it existed 13.4 billion years ago, just 400 million years after the Big Bang; as a result, GN-z11's distance is sometimes inappropriately reported as 13.4 billion light years, its light travel distance measurement.
The galaxy was identified by a team studying data from the Hubble Space Telescope's Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) and Spitzer Space Telescope's Great Observatories Origins Deep Survey-North (GOODS-North). million years older than the previous record-holder EGSY8p7, and is observed (shortly after but) "very close to the end of the so-called Dark Ages of the universe", and (during but) "near the very beginning" of the reionization era.The research team used Hubble's Wide Field Camera 3 to measure the distance to GN-z11 spectroscopically, by splitting the light into its component colors to measure the redshift caused by the expansion of the universe. The findings, which were announced in March 2016, revealed the galaxy to be farther away than originally thought, at the distance limit of what the Hubble Telescope can observe. GN-z11 is around 150
Compared with the Milky Way galaxy, GN-z11 is 1/25 of the size, has 1% of the mass, and is forming new stars approximately twenty times as fast.With a stellar age estimated at 40 million years, it appears the galaxy formed its stars relatively rapidly. The fact that a galaxy so massive existed so soon after the first stars started to form is a challenge to some current theoretical models of the formation of galaxies.
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| Most distant known astronomical object |
| Most distant known galaxy |