Galactic Radio Arc

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Chandra X-ray
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Galactic Center Radio Arc: X-ray gas associated with a radio arc located in the constellation Sagittarius.
(Credit: X-ray (blue): NASA/CXC/Northwestern/F.Zadeh et al.; Millimeter Wavelength (green): Nobeyama/M.Tsuboi; Radio (red): NRAO/AUI/NSF/F.Zadeh et al.)

Caption: This Chandra image of an X-ray filament and cloud about 40 light years across (blue inset) was made during an observation of a region of the Galactic Center. These X-ray features are associated with a huge cloud of cold gas (dark area in inset box) that is adjacent to large filamentary and shell-like structures that are bright sources of radio waves (red). The X-rays are thought to be produced when energetic electrons from the radio filaments collide with the cold gas cloud, which has a mass one million times the mass of the Sun.

Scale: X-ray/Molecular image is 8 by 7 arcmin; Radio image is 30 arcmin on a side.

Chandra X-ray Observatory ACIS Image

CXC operated for NASA by the Smithsonian Astrophysical Observatory