The James Webb Space Telescope has unveiled images that show, for the first time, starlight from two colossal galaxies with actively growing black holes, known as quasars, observed less than a billion years after the Big Bang. A recent study, published in the journal Nature, indicates that black
The James Webb Space Telescope has unveiled starlight from two ancient galaxies with quasars, less than a billion years post-Big Bang, revealing black holes with masses nearly a billion times that of the Sun. This groundbreaking discovery prompts questions about the early universe and the formation sequence of supermassive black holes and galaxies.
Quasars are luminous, while their host galaxies are faint, which has made it challenging for researchers to detect the dim light of the galaxy in the glare of the quasar, especially at great distances. Before the JWST, thewas able to detect host galaxies of luminous quasars when the universe was just under 3 billion years old, but no younger.
These two quasars were discovered in a deep survey program of the 8.2m-Subaru Telescope on the summit of Maunakea in Hawai’i. The relatively low luminosities of these quasars made them prime targets for measurement of the host galaxy properties, and the successful detection of the hosts represents the earliest epoch to date at which starlight has been detected in a quasar.
France Dernières Nouvelles, France Actualités
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