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Article Contents

ABSTRACT

1.INTRODUCTION

2.SEYFERT GALAXIES AND QSOS

2.1.Seyfert 1s and Seyfert 2s

2.1.1.The emission line spectrum of Seyfert 2 galaxies

2.1.2.The emission line spectrum of Seyfert 1 galaxies and QSOs

2.1.3.Diagnostic diagrams and composite nuclear spectra

2.2.The unified model

2.2.1.The Seyfert 1.8 and 1.9 galaxies

2.2.2.The X-ray properties of Seyfert 1 galaxies

2.2.3.The X-ray properties of Seyfert 2 galaxies

2.3.BALQSOs and warm absorbers

2.4.Fe II emission and narrow line Seyfert 1 galaxies

2.4.1.Fe II emission

2.4.2.Narrow line Seyfert 1 galaxies

2.5.Ultraluminous infrared galaxies

3.LINERS

3.1.Liners and AGNs

3.2.Liners and cooling flows

3.3.Liners and ULIGs

3.4.Emission lines in giant elliptical galaxies

4.RADIO GALAXIES

4.1.FR Is and FR IIs

4.2.Host galaxies of FR I and FR II radio sources

4.3.Emission line spectra of radio galaxies

4.3.1.FR II radio galaxies

4.3.2.FR I radio galaxies

4.4.Blazars

4.4.1.Emission line properties

4.4.2.Brightness temperature and variability of the core

4.4.3.Doppler and Lorentz factors

4.4.4.The dual nature of the BLLs

4.5.Basic differences between FR Is, FR IIs and radio quiet AGNs

4.5.1.Radio loud vs. radio quiet AGNs

4.5.2.FR I vs. FR II radio galaxies: the ADAF model

5.RED QSOS AND TYPE 2 QSOS

5.1.The relative numbers of Seyfert 1 and Seyfert 2 galaxies

5.2.Red QSOs

5.3.Type 2 QSOs

6.CONCLUSIONS

REFERENCES