Oldest known galaxies spotted by the James Webb Space Telescope

A group of international astronomers has used data from the James Webb Space Telescope to report the discovery of the oldest galaxies confirmed to date.

In the work, which NASA noted has not yet been peer-reviewed, the scientists found that the light from these galaxies took more than 13.4 billion years to reach Earth because the galaxies dated less than 400 million years after the Big Bang.

Previous data from Webb provided candidates for small galaxies and the targets were confirmed by obtaining spectroscopy observations.

Those observations revealed distinct, distinct patterns in the light emitted by the fainter galaxies.

NASA’s Orion spacecraft captures stunning video of the Moon and Earth

The Webb Advanced Deep Extragalactic Survey (JADES) focused on the region in and around the Hubble Space Telescope’s Ultra Deep Field. Using Webb’s NIRCam instrument, the scientists observed the field in nine different infrared wavelength ranges. From these images (displayed left), the team searched for faint galaxies that are visible in the infrared but whose spectra abruptly break off at a critical wavelength known as the “Lyman fracture.” The Webb NIRSpec instrument then provided an accurate measure of the redshift for each galaxy (shown at right). Four of the galaxies studied are particularly special, as they were revealed to be in an unprecedentedly early era. These galaxies date back less than 400 million years after the Big Bang, when the universe was only 2% of its current age. In the background image, blue represents light at 1.15 microns (115 W), green is 2.0 microns (200 W) and red is 4.44 microns (444 W). In the cut images, blue is a mixture of 0.9 and 1.15 μm (090 W + 115 W), green 1.5 and 2.0 μm (150 W + 200 W), and red 2.0, 2.77 and 4.44 μm (200 W + 277 W + 444 W).
(Image credit: NASA, ESA, CSA, STScI, M. Zamani (ESA/Webb), L. Hustak (STScI). Science: B. Robertson (UCSC), S. Tacchella (Cambridge), E. Curtis-Lake ( Hertfordshire), S. Carniani (Scuola Normale Superiore), and JADES Collaboration)

Using observations from the JWST Advanced Deep Extragalactic Survey (JADES) program, the observations focused on the region in and around the Hubble Space Telescope’s Ultra Deep Field.

Starting with the telescope’s Near Infrared Camera, or NIRCam, the JADES program used more than 10 days of mission time to observe the field in nine different infrared colors.

In the images, the smaller galaxies can be distinguished by the light being stretched along the wavelength by a factor of 14.

GREENBELT, MD - NOVEMBER 02: Engineers and technicians assemble the James Webb Space Telescope on November 2, 2016, at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

GREENBELT, MD – NOVEMBER 02: Engineers and technicians assemble the James Webb Space Telescope on November 2, 2016, at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
((Photo by Alex Wong/Getty Images))

NASA said astronomers searched for faint galaxies that can be seen in the infrared but whose light is suddenly cut off at a critical wavelength.

China’s capabilities pose a potential threat to US space assets, says the US military

The agency notes that the location of the cut-offs within each galaxy’s spectrum is shifting due to the expansion of the universe.

Then, using the near-infrared Spectrograph instrument for three days, the team collected the light from 250 fainter galaxies, studying the spectrum patterns by the atoms in each galaxy resulting in a precise measurement of each galaxy’s redshift and revealing the properties. of gas and stars in those galaxies.

This image from the James Webb Space Telescope highlights an area studied by the Webb Advanced Deep Extragalactic Survey (JADES).  This region lies in and around the ultra-deep field of the Hubble Space Telescope.  The 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 could be seen in the infrared but whose spectra abruptly cut off at a critical wavelength.  They made additional observations (not shown here) using Webb's NIRSpec instrument to measure the redshift of each galaxy and reveal the properties of the gas and stars in these galaxies.  In this image, blue represents light at 1.15 microns (115 W), green is 2.0 microns (200 W) and red is 4.44 microns (444 W).

This image from the James Webb Space Telescope highlights an area studied by the Webb Advanced Deep Extragalactic Survey (JADES). This region lies in and around the ultra-deep field of the Hubble Space Telescope. The 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 could be seen in the infrared but whose spectra abruptly cut off at a critical wavelength. They made additional observations (not shown here) using Webb’s NIRSpec instrument to measure the redshift of each galaxy and reveal the properties of the gas and stars in these galaxies. In this image, blue represents light at 1.15 microns (115 W), green is 2.0 microns (200 W) and red is 4.44 microns (444 W).
(Image credit: NASA, ESA, CSA, M. Zamani (ESA/Webb) Science: B. Robertson (UCSC), S. Tacchella (Cambridge), E. Curtis-Lake (Hertfordshire), S. Ordinary Chair), Collaboration JADES.)

It was revealed that four of the galaxies were unprecedentedly young, lying at a redshift above 10, or when the universe was about 330 million years old.

“For the first time, we detected galaxies just 350 million years after the Big Bang, and we can be pretty confident of their fantastic distances,” co-author Brant Robertson, of the University of California Santa Cruz and a member of the NIRCam science team, said. “Finding these early galaxies in such stunningly beautiful images is a special experience.”

Click here for the FOX NEWS app

Next year, JADES will continue a detailed study of another field, this one centered on the famous Hubble Deep Field.

#Oldest #galaxies #spotted #James #Webb #Space #Telescope

Leave a Reply

Your email address will not be published. Required fields are marked *