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Blazar Artist Concept

Aug. 24, 2016
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Larger image for PIA20912
Black-hole-powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma-ray Space Telescope as shown in this artist's concept.
Context Image
Larger image for PIA20912

Black-hole-powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma-ray Space Telescope. As matter falls toward the supermassive black hole at the galaxy's center, some of it is accelerated outward at nearly the speed of light along jets pointed in opposite directions. When one of the jets happens to be aimed in the direction of Earth, as illustrated here, the galaxy appears especially bright and is classified as a blazar.

An analysis of blazar properties observed by the Wide-field Infrared Survey Explorer (WISE) and Fermi's Large Area Telescope (LAT) reveal a correlation in emissions from the mid-infrared to gamma rays (see Figure 1). The relationship allows astronomers to identify potential new gamma-ray blazars by studying WISE infrared data.

More information is online at http://www.nasa.gov/wise and http://wise.astro.ucla.edu and http://www.jpl.nasa.gov/wise.

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  • Fermi Gamma-ray Space Telescope
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NASA/JPL-Caltech/GSFC

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