Credit: SciTechDaily.comUsing redshift and photometry, NASAs James Webb Space Telescope is revealing the secrets of early galaxies, showing the requirement for precise spectral information in comprehending the universes history.One of NASAs James Webb Space Telescopes science goals is to comprehend how galaxies in the early universe formed and developed into much bigger galaxies like our own Milky Way. Red, dusty galaxies at redshifts less than 5 (or when the universe was 1.1 billion years old or older) and cool stars in our own galaxy can often mimic the very same colors of a high-redshift galaxy. They permit us to find out more about conditions in galaxies and the way those conditions impact their photometry, to improve our designs of galaxy spectra, and to constrain galaxy advancement across all redshifts.
Credit: SciTechDaily.comUsing redshift and photometry, NASAs James Webb Space Telescope is revealing the tricks of early galaxies, showing the need for exact spectral data in understanding the universes history.One of NASAs James Webb Space Telescopes science objectives is to understand how galaxies in the early universe formed and evolved into much bigger galaxies like our own Milky Way. We measure the typical flux in each filter (circles) and fit these six information points with various galaxy designs at a range of redshifts to identify the possibility that the galaxy is at each redshift. For each galaxy, the teams show image cutouts in all available filters along the top, the observed photometry, the best-fitting galaxy design, and the photometric redshift possibility circulation as an inset. Red, dirty galaxies at redshifts less than 5 (or when the universe was 1.1 billion years old or older) and cool stars in our own galaxy can in some cases simulate the same colors of a high-redshift galaxy. They permit us to find out more about conditions in galaxies and the way those conditions impact their photometry, to improve our designs of galaxy spectra, and to constrain galaxy evolution across all redshifts.