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Related to Blazars: Quasars


 (blā′zär′, -sär′, -zər, -sər)
A compact, extremely bright, active galactic nucleus characterized by strong and rapid changes in the intensity of electromagnetic radiation emitted over a very broad range of frequencies ranging from radio waves to gamma rays. Although the source of blazar energy is the material surrounding a super-massive black hole at the galaxy center, much of the blazar luminosity originates in powerful jets of material moving along the line of sight toward Earth at near light speed.

[Coined by Edward A. Spiegel (1931-2010), American astronomer, as a blend (influenced by blaze) of BL Lac object, a type of blazar once thought to be a variable star (after BL Lacertae, a blazar in Lacerta), and quasar.]


a type of galaxy supplying more radiation than a quasar
References in periodicals archive ?
Blazars have been spotted throughout the sky, but researchers don't know how their jets form.
Abstract: Blazars are radio-loud active galactic nuclei (AGN) that are characterized by intense and rapid variability across the electromagnetic spectrum.
The extreme brightness and variability of blazars result from a chance orientation that brings one jet almost directly in line with Earth.
From blazars to thunderstorms, from dark matter to supernova remnants, catch the highlights of NASA Fermi's first five years in space.
The prior catalogues produced by Fermi contain literally thousands of gamma-ray emitters in the far-flung cosmos, corresponding to objects such as blazars and active galactic nuclei - both associated with black holes snacking at the centres of galaxies - or pulsars, fast-spinning neutron stars that flash our neighbourhood like a distant lighthouse.
Personally I [JT] have seen flickering visually in several dwarf novae and blazars but U Gem is the only object where I have seen it occur on multiple occasions.
It's already found hundreds of massive black holes known as blazars and has imaged the coldest known stars in the universe.
The fastest ' things' i n the Universe are blobs of superheated plasma that are ejected from black holes that are in the cores of extremely active galaxies known as blazars.
About two-thirds of the material is dedicated to invited talks covering black holes, blazars, active galactic nuclei and galactic masers, variability and high brightness objects, and radio stars.
Researchers at The University of Texas at Austin have found new evidence to suggest that all radio-loud quasars may be blazars and that the differences between them may be related to the angle from which they are viewed.
Since its 1991 launch aboard a shuttle, the Compton Observatory has detected 50 blazars.
Symposium subjects ranged from the discovery of new gamma-ray sources, such as blazars and supernova remnants, to the nature of mysterious dark matter and even observations of high-energy gamma rays emitted by thunderstorms.