To appear in The
Ringberg Workshop, `Ultraluminous Galaxies: Monsters or Babies'
(Ringberg Castle, Sept, 1998)
For a PDF version of the article, click
THE "GREAT DEBATE": THE CASE FOR AGNs
On behalf of the "green team"
D. B. Sanders
Astronomy, University of Hawaii
2680 Woodlawn Drive, Honolulu, HI 96822 USA
Abstract. We summarize the evidence from multiwavelength
observations that the dominant
power source in the majority of ultraluminous infrared galaxies (ULIGs)
an active galactic nucleus (AGN). In the broader context of the debate, we
also show that - 1. ULIGs are indeed a key stage in the transformation of
merging gas-rich disks into ellipticals, 2. ULIGs are plausibly the
precursors of quasi-stellar objects (QSOs), and 3. ULIGs do appear to be
local templates of the high luminosity tail of major gas-rich mergers at
z ~ 1-4.
Table of Contents
- Key Topics for the Debate
- OPENING REMARKS
- Working Definitions
- "ULTRALUMINOUS GALAXIES: MONSTERS OR BABIES"
- Multiwavelength Properties of the Nearest
- Summary: Comparison with RQQSOs
- MERGER SEQUENCE
- PRECURSORS OF QSOS
- LOCAL TEMPLATES OF HIGH-z MERGERS
- CONCLUDING REMARKS