The earliest galaxy so far seen?
Scientists using the James Webb Space Telescope now think they have identified a galaxy formed only 330 million years after the Big Bang.
The red smudge in the centre of this image [to the right] is thought to be a galaxy with a redshift of around z=13, as seen by the NIRCam instrument on the James Webb Space Telescope. This redshift estimate is based on photometry so the object remains a candidate rather than a confirmed high-redshift galaxy, but if confirmed spectroscopically this would be the highest-redshift galaxy yet observed.
You can read the research paper itself here [pdf]. The galaxy is actually very young, and its nature, along with a second also described by the research, appears to contradict expectations. From the paper’s abstract:
These sources, if confirmed, join GNz11 in defying number density forecasts for luminous galaxies based on Schechter UV luminosity functions, which require a survey area > 10× larger than we have
studied here to find such luminous sources at such high redshifts. They extend evidence from lower redshifts for little or no evolution in the bright end of the UV luminosity function into the cosmic dawn epoch, with implications for just how early these galaxies began forming. This, in turn, suggests that future deep JWST observations may identify relatively bright galaxies to much earlier epochs than might have been anticipated. [emphasis mine]
In other words, this early data from Webb suggests that galaxies formed much faster than expected after the Big Bang. This either means all the theories describing the Bang are wrong, or that it might not have even happened.
Scientists using the James Webb Space Telescope now think they have identified a galaxy formed only 330 million years after the Big Bang.
The red smudge in the centre of this image [to the right] is thought to be a galaxy with a redshift of around z=13, as seen by the NIRCam instrument on the James Webb Space Telescope. This redshift estimate is based on photometry so the object remains a candidate rather than a confirmed high-redshift galaxy, but if confirmed spectroscopically this would be the highest-redshift galaxy yet observed.
You can read the research paper itself here [pdf]. The galaxy is actually very young, and its nature, along with a second also described by the research, appears to contradict expectations. From the paper’s abstract:
These sources, if confirmed, join GNz11 in defying number density forecasts for luminous galaxies based on Schechter UV luminosity functions, which require a survey area > 10× larger than we have
studied here to find such luminous sources at such high redshifts. They extend evidence from lower redshifts for little or no evolution in the bright end of the UV luminosity function into the cosmic dawn epoch, with implications for just how early these galaxies began forming. This, in turn, suggests that future deep JWST observations may identify relatively bright galaxies to much earlier epochs than might have been anticipated. [emphasis mine]
In other words, this early data from Webb suggests that galaxies formed much faster than expected after the Big Bang. This either means all the theories describing the Bang are wrong, or that it might not have even happened.