Blazars - a New Type of Powerful Quasar
are the extremely bright cores in a small fraction of very distant . They are visible at or energies.
Blazars
Blazars are objects that emit very high amounts of electromagnetic radiation across all bands of the EM spectrum. Their redshift indicates that they, too, are extragalactic and occur towards to edge of the observable universe.
Blazars are members of a larger group of active galaxies, also termed active galactic nuclei (AGN).
Blazars are members of the family of active galactic nuclei and quasars, defined specifically by their strong optical Polarization and variability.
blazars a class of active galaxies that exhibit rapidly variable emission from the radio through gamma-ray band. The radiation is predominantly from jets moving near the speed of light.
Blazars are a class of AGN that are radio sources and consist of both Optically Violent Variables (OVVs) and BL Lac objects. They are highly variable AGN that do not display emission lines in their spectra.
Blazars are active galactic nuclei -- energetic regions surrounding massive black holes at the centers of galaxies. Material being drawn into the black hole forms a spinning disk called an accretion disk.
'Blazars' (BL Lac objects and OVV quasars). These classes are distinguished by rapidly variable, polarized optical, radio and X-ray emission.
blazars (NASA Thesaurus) Strongly optical polarized active galactic nuclei objects exhibiting BL Lacertae-like and quasar-like characteristics.
AGN are found at the heart of active galaxies, including quasars, Seyfert galaxies, blazars, and radio galaxies. In addition to their great energy output, they can be highly variable.
BL Lac Galaxies, which are also called blazars, were misnamed. The first one discovered was given a star name (BL Lac), in particular a name associated with stars that change brightness.
There may be at least three types of active galaxies, including Seyfert galaxies, quasars, and blazars (although they may be the same type of galaxy view from different distances and perspectives).
SEYFERT GALAXY ...
Blazars are believed to be an active galaxy with a relativistic jet that is pointed in the direction of the Earth. A radio galaxy emits radio frequencies from relativistic jets.
Blazar - A type of active galaxy named for BL Lacertae, the first of the type discovered. Blazars show rapid, unpredictable variations in brightness
Bow Shock - The region where the solar wind is slowed as it impinges on the Earth's magnetosphere ...
Other finds have included the most energetic supernova ever seen, a stellar explosion in the Antennae galaxy that is helping astronomers to refine the cosmic distance scale, 185 cataclysmic variable stars, 32 blazars, ...
The CGRO led to the discovery of blazars. CGRO was named to honor Dr. Arthur Holly Compton, who studied the scattering of high-energy photons by electrons. It will fall into the remote Pacific on June 3, 2000.
In any case, at the present time, this accreting-black-hole model is accepted as an explanation for the behavior of quasars, radio galaxies, and blazars, known collectively as active galactic nuclei (AGNs), ...
(b) A term collectively used to refer to Optically Violent Variables (OVVs) and BL Lac objects. All known blazars are radio sources [adapted from B.M. Peterson An Introduction to Active Galactic Nuclei, Cambridge University Press, (1997)].
It became the founding member of the "BL Lac Objects," or "blazars" as they are sometimes called. The variable jet turns out to be pointed right at Earth, and thus "blazingly" bright.
Further careful observations have shown that blazars reside at the centers of relatively normal elliptical galaxies. We consider these galaxies active because of the tremendous strength of the blazar radio emission.
Extended emission around blazars, while requiring high dynamic range to see in the presence of the strong core, is typically of about the luminosity and extent we'd see from FR I lobes seen end-on, ...
It is in fact the prototypical blazar (blazing quasi-stellar object), a highly compact quasar associated with a supermassive black hole presumed to be lying at the core of an active giant elliptical galaxy. Blazars are some of the most violent ...
 See also: Blazar, Energy, Galaxies, Black Hole, Galaxy
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