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Black Hole Outflows From Centaurus A
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Name: Centaurus A, Cen A, NGC 5128
Description: Elliptical Galaxy
Position (J2000): RA 13h 25m 27.62s | Dec -43° 1' 8.8"
Constellation: Centaurus
Observation Date: 6 pointings between 03/22/2007 - 05/30/2007
Observation Time: 199 hours
Color Code: X-ray (blue), Submillimeter (orange); Optical (white, brown)
Scale: Image is 24.3 arcmin across
Distance Estimate: About 11 million light years
Image Credit: X-ray: NASA/CXC/CfA/R.Kraft et al.; Submillimeter:      MPIfR/ESO/APEX/A.Weiss et al.; Optical: ESO/WFI
Release Date: January 30, 2009


Related Image:  G0901cx  G1221es  G1402cx
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ABOUT THIS IMAGE:

This image of Centaurus A shows a spectacular new view of a supermassive black hole's power. Jets and lobes powered by the central black hole in this nearby galaxy are shown by 870 micron submillimeter data (colored orange) from the Atacama Pathfinder Experiment (APEX) telescope in Chile and X-ray data (colored blue) from the Chandra X-ray Observatory. Visible light data from the Wide Field Imager on the Max-Planck/ESO 2.2 m telescope, also located in Chile, shows the dust lane in the galaxy and background stars. The X-ray jet in the upper left extends for about 13,000 light years away from the black hole. The APEX data shows that material in the jet is travelling at about half the speed of light.

Centaurus A is our nearest giant galaxy, at a distance of about 11 million light-years in the southern constellation of Centaurus. It is an elliptical galaxy, currently merging with a companion spiral galaxy, resulting in areas of intense star formation and making it one of the most spectacular objects in the sky. Centaurus A hosts a very active and highly luminous central region, caused by the presence of a supermassive black hole (see eso0109), and is the source of strong radio and X-ray emission.

In the image, we see the dust ring encircling the giant galaxy, and the fast-moving radio jets ejected from the galaxy center, signatures of the supermassive black hole at the heart of Centaurus A. In submillimeter light, we see not only the heat glow from the central dust disc, but also the emission from the central radio source and – for the first time in the submillimeter– the inner radio lobes north and south of the disc. Measurements of this emission, which occurs when fast-moving electrons spiral around the lines of a magnetic field, reveal that the material in the jet is travelling at approximately half the speed of light. In the X-ray emission, we see the jets emerging from the center of Centaurus A and, to the lower right of the galaxy, the glow where the expanding lobe collides with the surrounding gas, creating a shockwave.