File:PIA19822-MagneticBlackHoleWaves-AlfvenS-waves-20150709.jpg

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Summary

Description	English: PIA19822: Magnetic Black Hole Waves http://photojournal.jpl.nasa.gov/catalog/PIA19822 This cartoon shows how magnetic waves, called Alfven S-waves, propagate outward from the base of black hole jets. The jet is a flow of charged particles, called a plasma, which is launched by a black hole. The jet has a helical magnetic field (yellow coil) permeating the plasma. The waves then travel along the jet, in the direction of the plasma flow, but at a velocity determined by both the jet's magnetic properties and the plasma flow speed. The BL Lac jet examined in a new study is several light-years long, and the wave speed is about 98 percent the speed of light.
Date	9 July 2015
Source	http://photojournal.jpl.nasa.gov/jpeg/PIA19822.jpg
Author	NASA/JPL-Caltech

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