galactic fountain

galactic fountain

Hot X-ray emitting gas from groups of supernova remnants that breaks free of the plane of our Galaxy and expands away until it cools and falls back onto the disk in a fountainlike behavior.
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Their ejecta blast through the interstellar medium, heating it and giving rise to phenomena such as galactic fountains.
This instrument is most sensitive to diffuse ionized gas at temperatures of several hundred thousand degrees, and so it has the potential to map galactic fountains if they exist.