In "The Central Engine of Active Galactic Nuclei", ASP
Conference Series, Vol. 373, Xi'an, China, 16-21 October, 2007,
eds. L. C. Ho and J.-M. Wang
For a PDF version of the article, click here.
DUST IN ACTIVE GALACTIC NUCLEI
Aigen Li
Department of
Physics and Astronomy, University of Missouri,
Columbia, MO 65211, USA;
email: lia@missouri.edu
Abstract. Dust plays an essential role in the unification theory
of active galactic nuclei (AGNs).
This review summarizes our current understanding
of the extinction and infrared emission properties
of the circumnuclear dust in AGNs
as well as the inferred dust composition
and size distribution.
Table of Contents
INTRODUCTION: ARE ALL AGNS BORN EQUAL?
- THE ROLE OF DUST IN THE UNIFIED SCHEMES OF AGNs
- EXTINCTION - A POWERFUL DISCRIMINATOR OF DUST SIZE
- Interstellar Extinction: Milky Way, SMC, and LMC
- AGN Extinction - "Gray" or SMC-like Extinction?
- DUST SPECTROSCOPY - DIAGNOSIS OF DUST COMPOSITION
- The 2175 Å Extinction Bump
- The 3.4 µm Aliphatic Hydrocarbon
Absorption Feature
- The 9.7 µm and 18 µm Silicate
Absorption and Emission Features
- The 3.3, 6.2, 7.7, 8.6 and 11.3 µm PAH
Emission Features
- The Ice Absorption Features
- IR EMISSION MODELING - INFERRING DUST SIZE AND TORUS
GEOMETRY?
- REFERENCES
