Book contents
- Frontmatter
- Contents
- Index of Participants
- Preface
- I Evidence and Implications of Anisotropy in AGN
- II Luminosity Functions and Continuum Energy Distributions
- III The Broad Line Region: Variability and Structure
- IV X-rays and Accretion Disks
- X-ray Variability in AGN
- Thermal Reprocessing of X-rays in NGC 5548
- New Ginga Observation and Model of NGC 6814 Periodicity
- Power Spectrum Fits to EXOSAT Long Looks
- Dramatic X-ray Spectral Variability of Mkn 841
- Thermal and Non-Thermal Emission from Accretion Disks
- Ultra-Soft X-ray Emission in AGN
- Highly Ionized Gas in Seyfert Galaxies
- EUV Observations of Seyfert 1 Galaxies and Quasars
- 0.1–;20 keV Spectra of 3C 273 and E1821+643
- Iron Lines from Ionized Discs
- Reflection Effects in Realistic Discs
- X-Ray Polarization Properties in the Two-Phase Model for AGN
- X-Ray Reprocessing and UV Continuum in NGC 4151
- Dense Clouds Near the Center of Active Galactic Nuclei
- Accretion Discs in AGN Context: Hints Toward Non-Standard Discs?
- Accretion Disk Instabilities
- Compton-Heated Winds from Accretion Disks
- Determination of a Transonic Solution in a Stationary Accretion Disc
- Black Holes and Accretion Disks
- Testing the “Disc X-ray Reprocessing” in UV-Optical Continuum and Line Emission in NGC 5548
- Accretion Discs in Realistic Potentials
- Test of the Accretion Disc Model and Orientation Indicator
- Orientation Effects in QSO Spectra
- The Luminosity-Colour Distribution of Quasar Accretion Disks
- V Beams, Jets and Blazars
- VI Concluding Talk
Test of the Accretion Disc Model and Orientation Indicator
from IV - X-rays and Accretion Disks
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- Index of Participants
- Preface
- I Evidence and Implications of Anisotropy in AGN
- II Luminosity Functions and Continuum Energy Distributions
- III The Broad Line Region: Variability and Structure
- IV X-rays and Accretion Disks
- X-ray Variability in AGN
- Thermal Reprocessing of X-rays in NGC 5548
- New Ginga Observation and Model of NGC 6814 Periodicity
- Power Spectrum Fits to EXOSAT Long Looks
- Dramatic X-ray Spectral Variability of Mkn 841
- Thermal and Non-Thermal Emission from Accretion Disks
- Ultra-Soft X-ray Emission in AGN
- Highly Ionized Gas in Seyfert Galaxies
- EUV Observations of Seyfert 1 Galaxies and Quasars
- 0.1–;20 keV Spectra of 3C 273 and E1821+643
- Iron Lines from Ionized Discs
- Reflection Effects in Realistic Discs
- X-Ray Polarization Properties in the Two-Phase Model for AGN
- X-Ray Reprocessing and UV Continuum in NGC 4151
- Dense Clouds Near the Center of Active Galactic Nuclei
- Accretion Discs in AGN Context: Hints Toward Non-Standard Discs?
- Accretion Disk Instabilities
- Compton-Heated Winds from Accretion Disks
- Determination of a Transonic Solution in a Stationary Accretion Disc
- Black Holes and Accretion Disks
- Testing the “Disc X-ray Reprocessing” in UV-Optical Continuum and Line Emission in NGC 5548
- Accretion Discs in Realistic Potentials
- Test of the Accretion Disc Model and Orientation Indicator
- Orientation Effects in QSO Spectra
- The Luminosity-Colour Distribution of Quasar Accretion Disks
- V Beams, Jets and Blazars
- VI Concluding Talk
Summary
Abstract
Here is presented a statistical test for the accretion disc model. The effect of different inclinations of the disc to the line of sight is shown. Then the possibility that the ratio R of the radio core luminosity to the radio lobe luminosity is a good orientation indicator is investigated. It is shown that R. describes the intrinsic power of the central radio source.
A statistical test of the accretion disc model
The model adopted here is that, described by Collin and Dumont (1989), of an accretion disc illuminated by the central nonthermal source. The disc emits in its inner part the UV and optical continuum, and in its outer parts the low ionization lines (LIL; e.g., the Balmer lines) as proposed by Collin (1987). A second region emits the high ionization lines (HIL; e.g., Lα and CIV); it can have a spherical geometry. Both regions are illuminated by the central source. For the disc, illumination occurs through backscattering of the nonthermal radiation by a hot medium (halo). This model has been worked out by Dumont and Joly (1992).
Using the code of Dumont and Collin (1990) we have computed the line spectrum emitted by the illuminated disc as a function of the central source luminosity, the Eddington ratio (Lbol\LEdd) and the characteristics of the scattering halo (density structure and optical thickness).
- Type
- Chapter
- Information
- The Nature of Compact Objects in Active Galactic NucleiProceedings of the 33rd Herstmonceux Conference, held in Cambridge, July 6-22, 1992, pp. 350 - 353Publisher: Cambridge University PressPrint publication year: 1994