active galactic nucleus

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Related to Active galactic nuclei: quasar

active galactic nucleus

n.
A galactic nucleus that emits more radiation than can be accounted for solely by light from the stars it contains.
References in periodicals archive ?
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.
Abstract: Blazars are radio-loud active galactic nuclei (AGN) that are characterized by intense and rapid variability across the electromagnetic spectrum.
The 61 papers look at low-z mergers and starbursts, merger dynamics and simulations, mergers in galaxy evolution, merging and active galactic nuclei, high redshift merging and sub-millimeter galaxies, active galactic nuclei/starburst feedbacks, chemical evolution, and results from new surveys.
The observations, reported online September 27 in Science, may help explain how some active galactic nuclei launch powerful plasma jets thousands of light-years into space.
Peter Barthel, who studies quasars and active galactic nuclei at the Kapteyn Astronomical Institute at the University of Groningen, also claims scenes of penguins cavorting with polar bears, "corrupt nature".
Speakers included the Director, who gave a review of the year and then showed a selection of images from the Section archive, David Aditti on using the f/2 Hyperstar system, Owen Brazell on observing galaxy clusters, Nick Hewitt on active galactic nuclei and Geoffrey Johnstone on astrophotography in the 1980s.
The 89 papers reflect current understanding and ongoing controversy regarding active galactic nuclei (AGN), including the few that are loud in radio frequencies as well as bright in visible light.
According to ISRO, while operating from its 8[degrees] inclination in its 650km (400 miles) orbit Astrosat's scientific objectives include spectroscopic studies of X-ray binaries, supernova remnants, active galactic nuclei and galaxy clusters.
Johnson, whose field of study is active galactic nuclei, hopes to create an environment for prospective scientists that is every bit as stimulating as his own.