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Article Contents

ABSTRACT

1.THE STAGE IS SET

1.1.Historical perspective

1.2.Radiation processes

1.3.Generic classes of jets

1.4.Lifetimes and duty cycles

2.ARE THE RADIO STRUCTURES IN A STATE OF MINIMUM ENERGY?

2.1.Calculation of the minimum-energy field

2.2.Using X-rays to test minimum energy

3.DO POWERFUL LARGE-SCALE JETS HAVE FAST SPINAL SPEEDS?

3.1.The impetus from PKS 0637-752

3.2.The dependence of beamed iC-CMB on beaming factors and redshift

3.3.How is the beamed iC-CMB model faring under scrutiny?

3.4.Synchrotron emission as an alternative

4.WHAT KEEPS JETS COLLIMATED?

5.WHERE AND HOW DOES PARTICLE ACCELERATION OCCUR?

5.1.The link with synchrotron X-ray emission

5.2.Particle acceleration in knotty structures

5.3.Incorporating polarization data

6.WHAT IS JET PLASMA MADE OF?

7.WHAT DOES X-RAY EMISSION TELL US ABOUT THE DYNAMICS AND ENERGETICS OF RADIO PLASMA/GAS INTERACTIONS?

7.1.Expectations for FRIIs

7.2.Dynamics of FRIs in clusters

7.3.Centaurus A

7.4.The effect of galaxy mergers

8.IS A JET'S FATE DETERMINED BY THE CENTRAL ENGINE?

8.1.An evolutionary cycle?

8.2.The rôle played by accretion processes

8.3.The rôle of the environment

8.4.Information from beamed sources

9.SUMMARY AND CONCLUDING REMARKS

REFERENCES