Book contents
- Frontmatter
- Contents
- Preface
- List of Participants
- I INTRODUCTION
- II THE INNER PARSEC
- Angular Momentum Transfer in the Inner Parsec (Invited paper)
- Can Supernovae and Accretion Disks be Distinguished Spectroscopically?
- Low Ionization Broad Absorption Lines in Quasars
- The Aftermath of Tidal Disruption
- The Galactic Center — an AGN on a Starvation Diet (Poster talk)
- A Central Black Hole in M32? (Poster paper)
- Stars and Disks around Massive Black Holes (Poster paper)
- Accretion onto Massive Binary Black Holes (Poster paper)
- Profile Variations of Broad-Line Radio Galaxies (Poster paper)
- The Budget of Energy in AGNs and Quasars (Poster paper)
- The Detection of Microvariations for Akn 120 (Poster paper)
- The Contribution of Cool-Wind Reprocessing to AGN Spectra (Poster paper)
- III THE CIRCUMNUCLEAR REGION
- IV GAS DYNAMICS AND STAR FORMATION IN BARRED AND NORMAL GALAXIES
- V NUCLEAR GAS AND LARGE-SCALE PROPERTIES OF AGN AND STARBURST HOSTS
- VI HOST GALAXY-AGN-NUCLEAR STARBURST CONNECTION
- VII GALAXY INTERACTIONS AND INDUCED ACTIVITY
- VIII GAS DYNAMICS IN ELLIPTICALS
- IX AGN AND STARBURST HOSTS AT LARGE REDSHIFTS
- X CONFERENCE SUMMARY
- Subject Index
- Object Index
- Author Index
The Budget of Energy in AGNs and Quasars (Poster paper)
Published online by Cambridge University Press: 05 May 2010
- Frontmatter
- Contents
- Preface
- List of Participants
- I INTRODUCTION
- II THE INNER PARSEC
- Angular Momentum Transfer in the Inner Parsec (Invited paper)
- Can Supernovae and Accretion Disks be Distinguished Spectroscopically?
- Low Ionization Broad Absorption Lines in Quasars
- The Aftermath of Tidal Disruption
- The Galactic Center — an AGN on a Starvation Diet (Poster talk)
- A Central Black Hole in M32? (Poster paper)
- Stars and Disks around Massive Black Holes (Poster paper)
- Accretion onto Massive Binary Black Holes (Poster paper)
- Profile Variations of Broad-Line Radio Galaxies (Poster paper)
- The Budget of Energy in AGNs and Quasars (Poster paper)
- The Detection of Microvariations for Akn 120 (Poster paper)
- The Contribution of Cool-Wind Reprocessing to AGN Spectra (Poster paper)
- III THE CIRCUMNUCLEAR REGION
- IV GAS DYNAMICS AND STAR FORMATION IN BARRED AND NORMAL GALAXIES
- V NUCLEAR GAS AND LARGE-SCALE PROPERTIES OF AGN AND STARBURST HOSTS
- VI HOST GALAXY-AGN-NUCLEAR STARBURST CONNECTION
- VII GALAXY INTERACTIONS AND INDUCED ACTIVITY
- VIII GAS DYNAMICS IN ELLIPTICALS
- IX AGN AND STARBURST HOSTS AT LARGE REDSHIFTS
- X CONFERENCE SUMMARY
- Subject Index
- Object Index
- Author Index
Summary
ABSTRACT
The balance of energy in AGNs and quasars is assessed. It is shown that there is no “energy budget” problem in AGNs and quasars and the covering factor of the broad line region in these objects is around 0.1-0.2 and this does not change with the luminosity.
INTRODUCTION
It has been claimed that there is an “energy budget problem” for some continuum energy distributions (CEDs) used to model the broad line region (BLR) in AGNs and quasars. In this paper the budget of energy in AGNs is assessed from UV and soft X-ray observations.
ENERGY BUDGET
Soft X-ray observations of AGNs were obtained from the ROSAT/PSPC archive (at the University of Leicester, England) and reduced in the standard way (see Gondhalekar et al. 1993 for details). A single power law was found to be adequate to represent the data and the power law index (Γ) is given in Table 1. The details of this analysis will be the subject of a separate publication. The soft X-ray spectra deviate significantly from the (best fit by eye) models of Laor and Netzer (1989) at energies higher than 0.5 keV.
- Type
- Chapter
- Information
- Mass-Transfer Induced Activity in Galaxies , pp. 57 - 58Publisher: Cambridge University PressPrint publication year: 1994