High-luminosity IRAS galaxies. I - The proportion of IRAS galaxies in interacting systems

A. Lawrence, M. Rowan-Robinson, K. Leech, D. H. P. Jones, J. V. Wall

Research output: Contribution to journalArticlepeer-review


An analysis of CCD images of a sample of 60 high-luminosity IRAS galaxies from the redshift survey of Lawrence et al. (1986) and of a control sample of 87 optically selected galaxies from the Durham redshift survey (Peterson et al., 1986) is presented. It is found that 18 + or - 5 percent of the optically selected galaxies are interacting or merging systems, and that 11 + or - 8 percent of the low-luminosity IRAS galaxies are interacting or merging. At high luminosities, the proportion is shown to be 46 + or - 12 percent. The results suggest that although galaxy interaction is a common causal factor in luminous IR activity, it is far from being the ubiquitous factor suggested in recent reports.
Original languageEnglish
Pages (from-to)329-348
JournalMonthly Notices of the Royal Astronomical Society
Publication statusPublished - 1 Sep 1989


  • Galactic Structure
  • Infrared Sources (Astronomy)
  • Interacting Galaxies
  • Luminosity
  • Computational Astrophysics
  • Infrared Astronomy Satellite
  • Red Shift
  • Seyfert Galaxies
  • Sky Surveys (Astronomy)


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