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How Many Ulirgs are Mergers?

  • D. L. Clements
  • R. G. Mcmahon
  • W. J. Sutherland
  • W. Saunders
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)

Abstract

Ultraluminous IRAS Galaxies (ULIRGs) are unusual galaxies with luminosities > 1012 L (H0 = 75 kms-1Mpc-1), comparable to optically selected quasars, with up to 90% of this emitted in the 8–1000 µm region. Initial work on nearby ULIRGs suggested that all of these objects were in interacting or merging systems. Larger samples (e.g. Leech et al 1994) suggested that this might only be true for 2/3 of the objects. The triggering of ULIRG-type activity in the non-merging galaxies would then be difficult to understand.

References

  1. Clements, D. L., et al., (1995), MNRAS, in pressGoogle Scholar
  2. Leech, K., et al, (1994), MNRAS, 267, 253ADSGoogle Scholar
  3. Zhenglong, Z., et al, (1991), MNRAS, 252, 593ADSGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • D. L. Clements
    • 1
  • R. G. Mcmahon
    • 2
  • W. J. Sutherland
    • 3
  • W. Saunders
    • 3
  1. 1.ESOGarching b. MunchenGermany
  2. 2.IoACambridgeUK
  3. 3.Physics Dept.Oxford UniversityOxfordUK

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