NASA's Webb reaches new milestone in quest for distant galaxies NASA
Earlier data from Webb had provided candidates for such infant galaxies. Now, these targets have been confirmed by obtaining, revealing characteristic and distinctive patterns in the fingerprints of light coming from these incredibly faint galaxies.
The investigation of the faintest and earliest galaxies was the leading motivation behind the concepts for these instruments. In 2015 the instrument teams joined together to propose the JWST Advanced Deep Extragalactic Survey , an ambitious program that has been allocated just over one month of the telescope's time spread over two years, and is designed to provide a view of the early universe unprecedented in both depth and detail.of more than eighty astronomers from ten countries.
This image taken by the James Webb Space Telescope highlights the region of study by the JWST Advanced Deep Extragalactic Survey . This area is in and around the Hubble Space Telescope’s Ultra Deep Field. Scientists used Webb’s NIRCam instrument to observe the field in nine different infrared wavelength ranges. From these images, the team searched for faint galaxies that are visible in the infrared but whose spectra abruptly cut off at a critical wavelength.
"These are by far the faintest infrared spectra ever taken," said astronomer and co-author Stefano Carniani from Scuola Normale Superiore in Italy."They reveal what we hoped to see: a precise measurement of the cutoff wavelength of light due to the scattering of intergalactic hydrogen."
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