JADES-GS-z14-0
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JADES-GS-z14-0 is the most distant known galaxy, identified in May 2024 by NASA's James Webb Space Telescope (JWST). This galaxy was discovered[1] as part of the JWST Advanced Deep Extragalactic Survey (JADES) program, aimed at exploring the early universe and the formation of its first galaxies.
Discovery
[change | change source]JADES-GS-z14-0 was observed using JWST's Near-Infrared Spectrograph (NIRSpec), which provided a detailed spectrum of the galaxy, confirming its redshift of 14.32. This places the galaxy's formation at approximately 290 million years after the Big Bang, making it the most distant[2] galaxy ever observed. The discovery was announced on May 30, 2024.[3]
Characteristics
[change | change source]JADES-GS-z14-0 spans over 1,600 light-years and exhibits significant luminosity primarily from young stars. Spectroscopic analysis revealed the presence of strong ionized gas emissions, including hydrogen and oxygen. The detection of these elements suggests that multiple generations of massive stars had already formed and died, enriching the galaxy with heavier elements. This level of complexity in such an early galaxy challenges existing models of galaxy formation.
Significance
[change | change source]The discovery of JADES-GS-z14-0 has profound implications for our understanding of the early universe. The galaxy's unexpected size and brightness at such an early epoch suggest that the processes governing galaxy formation may be more dynamic and complex than previously thought. JADES-GS-z14-0's discovery marks a pivotal milestone in cosmology, providing new insights into the formation and evolution of the first cosmic structures.
Observations and techniques
[change | change source]The initial identification of JADES-GS-z14-0 came from imaging data obtained with JWST’s Near-Infrared Camera (NIRCam). The high-redshift hypothesis was confirmed through nearly ten hours of spectroscopic observations with NIRSpec. Additionally, observations using JWST's Mid-Infrared Instrument (MIRI) detected the galaxy at longer wavelengths, further supporting its extreme distance and providing more information about its composition and structure.
References
[change | change source]- ↑ "NASA's James Webb Space Telescope Finds Most Distant Known Galaxy - James Webb Space Telescope". blogs.nasa.gov. May 30, 2024.
- ↑ "Journey to Cosmic Dawn: James Webb Space Telescope Finds Oldest Galaxy Ever". www.jameswebbdiscovery.com. Retrieved 2024-05-31.
- ↑ Robert Lea (May 30, 2024). "James Webb Space Telescope spots the 2 earliest galaxies ever seen (image)". Space.com.
