The James Webb space telescope with its infrared imaging power has succeeded in hunting a cosmic object that is probably the most distant galaxy observed so far, but this issue is still not certain and It needs to be investigated further.
One of the design goals of the James Webb Space telescope was to provide imaging capabilities at wavelengths that would reveal the first stars and galaxies in the universe. Now, just a week after the first scientific images of this powerful observatory were revealed, we have a strong indication of its success.
In some data released by NASA, researchers have observed 5 galaxies from very far away in the universe. which existed only a few hundred million years after the Big Bang. If the distance of these objects is confirmed, one of them will be the most distant galaxy ever observed.
NASA usually allows astronomers to submit observational proposals for many of its observatories, and researchers For some time now, they can have exclusive access to the data from their observations.
For the newest human eye in space, NASA has a set of goals in mind whose data will be immediately exposed to the public for anyone to see as they wish. Analyze them. Some of these include places similar to one of the first images published by James Webb, where a large cluster of galaxies magnifies distant objects like a giant lens.
- James Webb telescope's first full-color image reveals the oldest structures in the universe
A survey by James Webb, called GLASS, using one of the instruments Scientific captures images with long exposures in different parts of the infrared spectrum. The full spectrum of wavelengths covered by the NIRCam instrument is divided into seven sections, and each section takes between 1.5 and 6.6 hours of imaging.
A large international team of researchers from These sections are used to conduct a special research. To identify distant galaxies, they look for objects that are present in some parts of the spectrum but not in others.
Graphic design by James Webb
These searches are based on the fact that after the formation of the cosmic microwave background waves For hundreds of millions of years, most of the universe was filled with hydrogen atoms. These atoms absorb any light with wavelengths longer than that of ionized hydrogen, thus obscuring the universe at these wavelengths. It was at the end of the ultraviolet spectrum. But between now and today, the expansion of the universe has moved this wavelength cutoff to the infrared, and this is one of the key reasons why web design is sensitive to infrared wavelengths.
Based on this , the research team was looking for objects that were seen in the lowest-energy parts of James Webb's infrared spectrum, but were not present in the higher-energy (shorter wavelength) parts. The exact point at which such objects disappear indicates how far the galaxy's spectral cut has been redshifted, and thus how far away it is.
Five different objects were identified by this method, and a draft version of The research results are focused on the two most distant ones: GLASS-z13 and GLASS-z11. The former is even further than the farthest confirmed distance from anything seen in the Hubble Ultra Deep Image.
If this distance is confirmed, it would be the most distant object we know of and the closest in time. The observed mass will be Big Bang, but more research must be done to confirm the issue.
- What is the significance of the James Webb Space telescope photos?
Cover photo: The (probable) most distant galaxy
detected by the James Webb Telescope
Sources: Ars Technica, CNet