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How Many ULIRGs are Mergers?

Published online by Cambridge University Press:  25 May 2016

D.L. Clements ,
R.G. McMahon ,
W.J. Sutherland  and
W. Saunders
D.L. Clements
Affiliation:
ESO, Karl-Schwarzschild-Strasse 2, D-85748 Garching h. Munchen
R.G. McMahon
Affiliation:
IoA, Madingley Road, Cambridge, UK
W.J. Sutherland
Affiliation:
Physics Dept., Oxford University. Keble Road, Oxford, UK
W. Saunders
Affiliation:
Physics Dept., Oxford University. Keble Road, Oxford, UK

Extract

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Ultraluminous IRAS Galaxies (ULIRGs) are unusual galaxies with luminosities > 1012L ⊙ (H0 = 75 kms−1 Mpc−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.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 354
Copyright
Copyright © Kluwer 1996 

References

Clements, D.L., et al., (1995), MNRAS, in press Google Scholar
Leech, K., et al, (1994), MNRAS, 267, 253 CrossRefGoogle Scholar
Zhenglong, Z., et al, (1991), MNRAS, 252, 593 CrossRefGoogle Scholar