Tag

Host Galaxies

All articles tagged with #host galaxies

Quasars Concealed within Host Galaxies: New Research Reveals
astronomy2 years ago

Quasars Concealed within Host Galaxies: New Research Reveals

New research challenges the prevailing idea that quasars are only obscured by donut-shaped rings of dust in their immediate surroundings. A study led by Durham University found evidence that in some quasars, the obscuration is entirely caused by the host galaxy itself. These quasars reside in compact "starburst galaxies" with intense rates of star formation, where clouds of gas and dust can completely hide the quasar. This phenomenon occurs during an intense growth spurt of the quasar and provides insights into the link between galaxy growth and black hole activity. Unveiling these buried quasars will help scientists understand the connection between galaxies and supermassive black holes.

Unveiling the Host Galaxies of Ancient Quasars in the Early Universe
astronomy2 years ago

Unveiling the Host Galaxies of Ancient Quasars in the Early Universe

The James Webb Space Telescope (JWST) has captured images revealing starlight from two massive galaxies hosting quasars, or actively growing black holes, less than a billion years after the Big Bang. The black holes have masses close to a billion times that of the sun, while the host galaxies are almost one hundred times larger. This discovery raises questions about how these black holes grew so large in the early universe and the relationship between black holes and galaxies. The JWST's infrared capabilities allowed researchers to detect the faint light of the host galaxies, providing insights into the formation of black holes and their connection to galaxies.