Science, Space and Technology News 2024
This infrared image from NASA’s James Webb Space Telescope was taken by the NIRCam for the JWST Advanced Deep Extragalactic Survey, or JADES, program. The NIRCam data was used to determine which galaxies to study further with spectroscopic observations. One such galaxy, JADES-GS-z14-0 , was determined to be at a redshift of 14.32 , making it the current record-holder for the most distant known galaxy. This corresponds to a time less than 300 million years after the Big Bang.
Scientists used NASA’s James Webb Space Telescope’s NIRSpec to obtain a spectrum of the distant galaxy JADES-GS-z14-0 in order to accurately measure its redshift and therefore determine its age. The redshift can be determined from the location of a critical wavelength known as the Lyman-alpha break. This galaxy dates back to less than 300 million years after the Big Bang. Credit: NASA, ESA, CSA, Joseph Olmsted , S.
“Jake’s analysis indicates that the brightness of the source implied by the MIRI observation is above what would be extrapolated from the measurements by the other Webb instruments, indicating the presence of strong ionized gas emission in the galaxy in the form of bright emission lines from hydrogen and oxygen.
“Given the relatively small region of the sky that we searched to find JADES-GS-z14-0, its discovery has profound implications for the predicted number of bright galaxies we see in the early universe, as discussed in another concurrent JADES study. It is likely that astronomers will find many such luminous galaxies, possibly at even earlier times, over the next decade with Webb.
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