The Observed Evolution of the M87 Jet

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present results of continued monitoring of the jet in M87 using the Very Large Array at 15 GHz. Seven images with 0.15(") resolution have now been obtained between 1982 and 1993. The most recent images clearly demonstrate the presence of superluminal motion at speeds approaching 3c for several small features within the jet. Moreover, the general predominance of speeds in the range 0.5c to 1.0c is confirmed. New emission features are seen to form spontaneously within the first few hundred parsecs of the jet. A ``movie" illustrating the jet's observed evolution will be presented. Physical models for the observed motions and variations will be discussed.

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