Variability of Active Galaxies: Proceedings of a Workshop of the Sonderforschungsbereich 328 Held at Heidelberg, Germany 3–5 September 1990

Peter L. Biermann (auth.), Wolfgang J. Duschl, Stefan J. Wagner, Max Camenzind (eds.)3540538607, 9783540538608, 0387538607

The enormous amounts of energy radiated from the active nuclei of galaxies vary on short time scales, and the emission regions are difficult to observe. To provide a complete understanding of these phenomena a wide variety of studies is presented in this volume. The contributions are broadly divided between line and continuum variability, with observational results, methodological approaches, and theoretical models accompanying each. The final part is devoted to the important aspect of propagation-induced variability.

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Table of contents :
Have all questions been asked?….Pages 1-7
Line and continuum variability in NGC 4151….Pages 9-17
The optical, ultraviolet and X-ray variations in NGC 4151….Pages 19-30
Mapping the BLR in NGC 5548 & NGC 4151….Pages 31-46
Ground-based studies of emission-line variability: Recent results for NGC 5548 and future plans….Pages 47-56
Variability of line profiles in NGC 5548….Pages 57-64
Continuum variability in NGC 5548: Implications for theoretical models….Pages 65-69
Variability in Markarian 279….Pages 71-78
A search for variability in PKS 1302-102….Pages 79-82
Meteorology of the broad line region….Pages 83-96
An atlas of 2-dimensional transfer functions of the Broad Line Region….Pages 97-104
Limits on the expansion of the radio source OQ 208 in Mkn 668….Pages 105-106
BLR models and the L-M relation for AGNs….Pages 107-116
Variability of BL Lac objects in the radio regime….Pages 117-129
Intraday radio variability of quasars and BL Lac objects….Pages 131-141
The high frequency properties of synchrotron radiation….Pages 143-153
Synchrotron source models and the infrared-optical variability of blazars….Pages 155-162
Rapid variability of BL Lac objects in the optical regime….Pages 163-173
UV variability of blazars….Pages 175-178
The connection between Frequency Dependent Polarization (FDP) and growing radio shocks in blazars….Pages 179-180
Optical observations of rapid variability in the QSO PG 0117+213….Pages 181-186
The connection between blazars and compact radio sources….Pages 187-191
VLBI knots and superluminal motion….Pages 193-199
Relativistic jet models and variable knot emission….Pages 201-210
Particle acceleration and variability: Magnetic reconnection in AGN….Pages 211-220
Electron-ion coupling in Compton-heated plasmas….Pages 221-224
Variable radio sources and the two-fluid models….Pages 225-234
Infrared variability of active nuclei….Pages 235-239
Continuum variability in quasars and Seyfert galaxies….Pages 241-246
The variability of Ly-alpha in 3C273….Pages 247-247
The electromagnetic spectrum of the radio-quiet quasar 1821+643 and comparison with 3C 273….Pages 249-254
Variability of active galactic nuclei: A theorist’s view….Pages 255-264
The stability of thick disks….Pages 265-274
Brightness and color variations of accretion disks: Implications for the parameters….Pages 275-279
Structure and variability in broad absorption lines of quasar spectra….Pages 281-286
Are the broad emission lines of quasars affected by gravitational microlensing?….Pages 287-289
Gravitational microlensing and the Hamburg quasar monitoring program….Pages 291-302
Lensing of BL Lac objects….Pages 303-312