Page 35 - 83 basic knowledge of astronomy
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Figure 27: Many galaxies show activity in their nuclei, involving violent
ejections of high–energy electrons and resultant synchrotron radiation. A
nearby galaxy M87, also known as Virgo A or 3C 274 in radio astronomy, is an
example. Left: Infrared image of M87 by 2 Micron All Sky Survey (2MASS).
Right: Close–up view of a collimated jet by Hubble Space Telescope (HST).
(Figure courtesy of NASA/IPAC Extragalactic Database (NED) operated
by the Jet Propulsion Laboratory, California Institute of Technology, under
contract with the National Aeronautics and Space Administration).
B
Centrifugal force
v v
P v
T
v
T
Lorentz force acceleration
Radiation in non-relativistic case
Figure 28: “Cyclotron” or “Gyro–synchrotron” radiation
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