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Дата изменения: Thu Dec 8 10:12:35 2005
Дата индексирования: Tue Dec 25 22:47:32 2007
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X Rays from the Perseus Cluster Core
Astronomy Picture of the Day
    


X Rays from the Perseus Cluster Core
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X Rays from the Perseus Cluster Core
Credit: A. Fabian (IoA Cambridge) et al., NASA
Explanation: The Perseus Cluster of thousands of galaxies, 250 million light-years distant, is one of the most massive objects in the Universe and the brightest galaxy cluster in the x-ray sky. At its core lies the giant cannibal galaxy Perseus A (NGC 1275), accreting matter as gas and galaxies fall into it. This deep Chandra Observatory x-ray image spans about 300,000 light-years across the galaxy cluster core. It shows remarkable details of x-ray emission from the monster galaxy and surrounding hot (30-70 million degrees C) cluster gas. The bright central source is the supermassive black hole at the core of Perseus A itself. Low density regions are seen as dark bubbles or voids, believed to be generated by cyclic outbursts of activity from the central black hole. The activity creates pressure waves - sound waves on a cosmic scale- that ripple through the x-ray hot gas. Dramatically, the blue-green wisps just above centre in the false-color view are likely x-ray shadows of the remains of a small galaxy falling into the burgeoning Perseus A.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: Perseus A - NGC 1275 - galaxy cluster - Perseus cluster - X-ray - active galaxy
Publications with words: Perseus A - NGC 1275 - galaxy cluster - Perseus cluster - X-ray - active galaxy
See also:
All publications on this topic >>