All articles tagged with #protocluster
Using the James Webb Space Telescope, astronomers studied the distant galaxy protocluster A2744-z7p9OD at redshift 7.88 and found that its core is remarkably evolved, containing massive, dusty galaxies with declining star formation, indicating an advanced stage of development earlier than expected for such an early epoch.
Astronomers have discovered a massive protocluster around a luminous quasar known as J0910–0414, which is one of the most overdense structures known in the early universe. The protocluster, estimated to be three times greater than the nearby Coma cluster, is the most massive one found at a redshift higher than 6.0. This discovery was made possible through observations using the Hyper Suprime-Cam on the Subaru Telescope, the Atacama Large Millimeter/submillimeter Array (ALMA), and other ground-based facilities. The findings suggest that targeting quasar fields with both ALMA and narrow-band observations is an efficient way to identify galaxy overdensities and study the environmental dependence of galaxy evolution.
The James Webb Space Telescope has captured images of seven galaxies that make up the youngest protocluster ever seen by astronomers, just 650 million years after the Big Bang. The protocluster will eventually grow in mass and size by incorporating galaxies, forming a galactic cluster that resembles the Coma Cluster. The observation of these galaxies could help scientists better understand how the cosmos has evolved over its 13.8-billion-year existence. The team was able to determine that the galaxies are moving at over 2 million mph through a halo of dark matter, and the key to doing this was precise measurements captured by Webb's Near-Infrared Spectrograph.