Английская Википедия:GLASS-z12
Шаблон:Short description Шаблон:Infobox galaxy
GLASS-z12 (formerly known as GLASS-z13) is a Lyman-break galaxy discovered by the Grism Lens-Amplified Survey from Space (GLASS) observing program using the James Webb Space Telescope's NIRCam in July 2022.[1][2] Spectroscopic observations of GLASS-z12 by the Atacama Large Millimeter Array (ALMA) in August 2022 confirmed that the galaxy has a spectroscopic redshift of Шаблон:Val, making it one of the earliest and most distant galaxies ever discovered, dating back to just 350 million years after the Big Bang, 13.6 billion years ago.[3][4] ALMA observations detected an emission line associated with doubly ionized oxygen (O III) at 258.7 GHz with a significance of 5σ, suggesting that there is very low dust content in GLASS-z12, if not the early universe as well.[5] Also based on oxygen-related measurements, the age of the galaxy is confirmed.[6][7]
GLASS-z12 derives its name from the GLASS survey that discovered it and its estimated photometric redshift of approximately z = Шаблон:Val.[8] GLASS-z12 was initially announced as GLASS-z13 because it was thought to have a higher redshift of z = 13.1.[9][5] This redshift value was later revised down to z = 12.4 in October 2022, resulting in the renaming of this galaxy.[8]
GLASS-z12 has a light-travel distance (lookback time) of 13.6 billion years.[4] However, due to the expansion of the universe, its present proper distance is 33.2 billion light-years.[4] It was discovered alongside another galaxy, GLASS-z10, comparable to GN-z11, also one of the oldest galaxies discovered.[3]
See also
- CEERS-93316
- Earliest galaxies
- HD1 (galaxy)
- JADES-GS-z13-0
- List of the most distant astronomical objects
- Lyman-break galaxy
References
Шаблон:Reflist Шаблон:James Webb Space Telescope Шаблон:2022 in space
- ↑ Шаблон:Cite news
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