to right, the radio image (in red) is superimposed on an optical one (in blue) that shows the galaxy surrounding the active nucleus http://www.cv.nrao.edu/~abridle/dragnparts.htm
Some Spectacular Jets
Radio galaxies can have incredibly large jets that escape from the galaxy itself and penetrate many thousands of parsecs into the surrounding space. Here are a couple of examples:
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3C31 radio image to left (From A. Bridle, http://www.cv.nrao.edu/~abridle/3c31.htm) to right, the radio image (in red) is superimposed on an optical one (in blue) that shows the galaxy surrounding the active nucleus http://www.cv.nrao.edu/~abridle/dragnparts.htm |
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Hercules A, combined radio and optical image. The giant
galaxy is the fuzzy patch in the center; the ratio jets penetrate far from
it into intergalactic space. (From https://science.nrao.edu/facilities/vla, credit NASA, ESA, S. Baum, C. O'Dea, R. Perley, W. Cotton, Hubble Heritage Team) |