If galaxy collisions are not responsible for triggering active galactic nuclei
, it suggests less violent processes within galaxies may play a greater role in feeding black holes, said Kocevski.
For four decades, astronomers have tried to turn active galactic nuclei
into cosmic mile markers.
Astrophysics of gaseous nebulae and active galactic nuclei
, 2d ed.
For many objects -- including dust-embedded stars, active galactic nuclei
, and even entire galaxies -- the visible radiation absorbed by the dust and re-radiated in the infrared accounts for virtually the entire luminosity.
Objective: A wide diversity of astrophysical phenomena - from stellar flares in the solar neighborhood to accretion in galactic nuclei
at cosmological distances - are characterized by flux and spectral changes on time scales ranging from a fraction of a second to several years.
The team found that 20 of these 27 ultra-energetic rays came from points in the sky coinciding with the known locations of active galactic nuclei
Theorists who model the evolution of galaxies often invoke supermassive black holes called active galactic nuclei
, which can also generate savage winds, to explain how gas needed to form stars can be depleted.
Active galactic nuclei
whose jets happen to point directly at Earth are especially conspicuous in the sky, and only they produce detectable gamma-ray emission.
These so-called active galactic nuclei
(AGN) are among the most luminous objects in the universe.
Objective: "Some of the most important open questions in astrophysics concern how and when active galactic nuclei
(AGN) are triggered, and how important they are in the evolution of galaxies.
TEHRAN (FNA)- Active galactic nuclei
are the brightest objects in the universe.
The new study focuses on the "feeding" ones, called active, supermassive black holes, or active galactic nuclei
At a distance of only 13 million light-years, the Circinus Galaxy contains one of the closest and brightest active galactic nuclei
Astronomers have recently begun to spot filaments backlit from a distance by extremely bright galactic nuclei
Abstract: Blazars are radio-loud active galactic nuclei
(AGN) that are characterized by intense and rapid variability across the electromagnetic spectrum.