Euclid: Disky titans - surprisingly high star formation activity and gas content in two brightest group galaxies at z 0.75
Euclid data discovered two massive, star-forming galaxies in strong over-densities at redshift 0.75 with surprisingly high star formation efficiency and cold gas reserves. These 'disky titans' challenge models by suggesting they are rejuvenated after a merger, allowing them to restart intense star formation despite their large halo masses.