(NASA, STSCI, CEERS, TACC, S. FINKELSTEIN , M. BAGLEY , R. LARSON, Z. LEVAY https://bit.ly/3pWWqt2)
The James Webb Space Telescope (JWST) has obtained its record-breaking wide-angle deep image of a portion of the sky in the constellation Ursa Major.
The image contains a huge number of galaxies that existed at different stages of the life of the universe.
The observation, which is part of the CEERS Sky Survey, includes one of the candidates for a record distant galaxy, with more than 13.5 billion years.
CEERS (Cosmic Evolution Early Release Science Survey) was one of the first deep sky surveys conducted by the JWST.
The telescope allotted to CEERS more than 60 hours of observing time.
The observations are made in the near and middle infrared ranges using the MIRI, NIRSpec and NIRCam instruments.
The work also covers a section of the sky in the constellation Ursa Major with an area of 100 square minutes of arc.
Thanks to the survey scientists expect to discover about 20-80 galaxies at redshifts z ~ 9-13, as well as more distant galaxies at high redshifts.
They also hope to receive spectra of more than 400 galaxies at z greater than 3.
This will significantly expand our understanding of the origin and evolution of galaxies in the Universe.
We could also understand the growth of supermassive black holes and the dynamics of the star formation rate at z~1-3.
THE STUDY
Now, the James Webb team has published a color mosaic image created from 690 frames taken by the NIRCam camera during the CEERS Epoch 1 survey phase.
The observation covers an area of the sky approximately eight times larger than the Webb’s first deep field image, a record-breaking wide sky image for the observatory.
The observations took a total of one day.
It shows a huge number of galaxies of various shapes and sizes that existed until the time when the first stars and galaxies formed - about 200-300 million years after the Big Bang.
Scientists highlight a number of interesting objects found in the image, like spiral galaxies with an abundance of star clusters and star formation regions, interacting and merging galaxies.
In addition, the image shows one of several record-breaking galaxy candidates found by the observatory.
Nicknamed the Macy Galaxy, the system has a photometric redshift of z=14.3, corresponding to the age of the universe at the time of its existence at 286 million years.
The discovery is expected to be confirmed by further observations of the JWST.
Source:
- CEERS Sky Survey: https://ceers.github.io/ceers-first-images-release
- Space.com: https://www.space.com/james-webb-space-telescope-largest-image
- Gizmodo: https://gizmodo.com/webb-telescope-ceers-survey-galaxies-image-1849458237
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