ABSTRACT. We review the observational evidence for the Baldwin Effect, and the empirical behavior of emission lines in relation to multi-wavelength continuum emission for AGNs.
Table of Contents
INTRODUCTION
HISTORY
Discovery
Doubts and Confirmation
CURRENT STATUS
Observational Methods and Results
Slope as a Function of Ionization
DETAILED LUMINOSITY EFFECTS
The
Importance of Luminosity Range
Second Order Effects
VARIABLE LUMINOSITY
The
Intrinsic BE
The
Intrinsic versus Ensemble BE
FURTHER SYSTEMATICS AND PHENOMENOLOGY
Line Profile Issues
Radio-loud versus Radio-quiet
The
X-ray BE
THE
BALDWIN EFFECT AT HIGH REDSHIFT
Evidence of Evolution
Preliminary Results at z > 4
SUMMARY AND FUTURE DIRECTIONS
REFERENCES