“Super-Explosion” Observed in Massive Elliptical Galaxy

6a00d8341bf7f753ef0133f32e5895970b-320wiThis image below shows a galactic "super-eruption" in the massive galaxy M87 (left), as observed by NASA's Chandra X-ray Observatory and NSF's Very Large Array (VLA). At a distance of about 50 million light years, M87 is relatively close to Earth and lies at the center of the Virgo cluster, home to thousands of galaxies.

The cluster surrounding M87 is filled with hot gas glowing in X-ray light (shown in blue) that is detected by Chandra. As this gas cools, it can fall toward the galaxy's center where it should continue to cool even faster and form new stars.

Radio observations with the VLA (red-orange) suggest however that in M87 jets of very energetic particles produced by the black hole interrupt this process. These jets lift up the relatively cool gas near the center of the galaxy and produce shock waves in the galaxy's atmosphere because of their supersonic speed.

The interaction of this cosmic "eruption" with the galaxy's environment is very similar to that of the Eyjafjallajokull volcano in Iceland that occurred in 2010. With Eyjafjallajokull, pockets of hot gas blasted through the surface of the lava, generating shock waves that passed through the grey smoke of the volcano. This hot gas then rises up in the atmosphere, dragging the dark ash with it.


Similar to Eyjafjallajokull, the energetic particles produced in the vicinity of the black hole rise through the X-ray emitting atmosphere of the cluster, lifting up the coolest gas near the center of M87 in their wake. And like the volcano here on Earth, shock waves can be seen when the black hole pumps energetic particles into the cluster gas. The energetic particles, coolest gas and shock waves are shown in a labeled version.

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Casey Kazan via Chandra X-ray Center

Credit:    X-ray (NASA/CXC/KIPAC/N. Werner et al); Radio (NRAO/AUI/NSF/W. Cotton)

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