![]() JADES is an international collaboration of more than eighty astronomers from ten countries. In 2015 the instrument teams joined together to propose the JWST Advanced Deep Extragalactic Survey (JADES), 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. The investigation of the faintest and earliest galaxies was the leading motivation behind the concepts for these instruments. ![]() The observations resulted from a collaboration of scientists who led the development of two of the instruments on board Webb, the Near-Infrared Camera (NIRCam) and the Near-Infrared Spectrograph (NIRSpec). ![]() Carniani (Scuola Normale Superiore), and the JADES Collaboration In the background image blue represents light at 1.15 microns (115W), green is 2.0 microns (200W), and red is 4.44 microns (444W). These galaxies date back to less than 400 million years after the big bang, when the universe was only 2% of its current age. Four of the galaxies studied are particularly special, as they were revealed to be at an unprecedentedly early epoch. Webb’s NIRSpec instrument then yielded a precise measurement of each galaxy’s redshift (shown at right). From these images (shown at left), the team searched for faint galaxies that are visible in the infrared but whose spectra abruptly cut off at a critical wavelength known as the Lyman break. Using Webb’s NIRCam instrument, scientists observed the field in nine different infrared wavelength ranges. The JWST Advanced Deep Extragalactic Survey (JADES) focused on the area in and around the Hubble Space Telescope’s Ultra Deep Field.
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