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They first looked at archival spectra of such molecules as methyl alcohol and carbon monosulfide from the Atacama Large Millimeter/Submillimeter Array (ALMA). Cecil and colleagues were curious if there was a northern counter-jet as well. In 2013, evidence for a stubby southern jet near Sagittarius A* came from X-rays detected by NASA’s Chandra X-ray Observatory and radio waves detected by NSF’s Karl G. “We pieced together multiwavelength observations from a variety of telescopes that suggest the black hole burps out mini-jets every time it swallows something hefty, like a gas cloud.” Gerald Cecil, an astronomer at the University of North Carolina. “Sagittarius A* is dynamically variable and is currently powered down,” said Dr.
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Image credit: NASA / ESA / Gerald Cecil, University of North Carolina / Joseph DePasquale, STScI.
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The graphic of a translucent, vertical white fan is added to show the suggested axis of a mini-jet from the supermassive black hole at the Galaxy’s heart. These data are evidence that the black hole occasionally accretes stars or gas clouds, and ejects some of the superheated material along its spin axis. Farther down near the black hole are X-ray observations of superheated gas colored blue and molecular gas in green. The jet scatters off the cloud into tendrils that flow northward. One such feature, at the top tip of the jet is interpreted as a hydrogen cloud that has been hit by the outflowing jet. The orange-colored features are of glowing hydrogen gas. This is a composite view of X-rays, molecular gas, and warm ionized gas near the Milky Way’s center (yellow represents Hubble data, blue is Chandra data, green is ALMA data, and red is VLA data).