Advertisement

IRAS Observations of Galaxies

  • B. T. Soifer
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 160)

Abstract

The basic properties of galaxies at 12μm, 25μm, 60μm and 100μm have been determined from IRAS observations. The far infrared luminosity of galaxies is a substantial, but not dominant, component of the luminosity output of the local universe. From a careful analysis of the spatial distribution of the infrared emission in the nearby spiral galaxy M33 it is found that approximately 3/4 of the total infrared luminosity from this galaxy originates in stars with ages less than a few hundred million years. To the extent that M33 is a typical spiral galaxy, this supports the prejudice that the infrared emission in galaxies is measuring the luminosity of newly formed stars. Interactions are found to be a major trigger of the high activity phase (L ir > 1011 L ) in galaxies. A substantial fraction of all massive spiral galaxies probably undergo such a phase over the course of their evolution.

Keywords

Spiral Galaxy Luminosity Function Infrared Emission Elliptical Galaxy Local Universe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Helou, George (1986) “The IRAS Colors of Normal Galaxies,” Astrophysical Journal Letters 311, 33– 36.ADSCrossRefGoogle Scholar
  2. Jura, M., Kim, DW., Knapp, GR., and Guhathakurta, P. (1987) “Interstellar Dust in Shapley-Ames Elliptical Galaxies,” Astrophysical Journal Letters 312, L11-L15.ADSCrossRefGoogle Scholar
  3. Knapp, G.R., Guhathakurta, P., Kim, D.W., and Jura, M. (1989) “Interstellar Matter in Early-Type Galaxies I. IRAS Flux Densities,” Astrophysical Journal Supplement Series 70, 329–387.ADSCrossRefGoogle Scholar
  4. Rice, WL., Boulanger, F., Viallefond, F., Soifer, BT., and Freedman, W. (1989) “The Infrared Structure of M33,” Astrophysical Journal (in press).Google Scholar
  5. Sanders, D.B., Soifer, B.T., Elias, J.H., Madore, B.F., Matthews, K., Neugebauer, G., and Scoville, N.Z. (1988a) “Ultraluminous Infrared Galaxies and the Originof Quasars,” Astrophysical Journal 325, 74–91.ADSCrossRefGoogle Scholar
  6. Sanders, D.B., Soifer, B.T., Elias, J.H., Neugebauer, G., and Matthews, K. (1988b) “Warm Ultraluminous Galaxies in the IRAS Survey: The Transition From Galaxy to Quasar?,” Astrophysical Journal Letters 328, L35–L39.ADSCrossRefGoogle Scholar
  7. Sellgren, K. (1984) “The Near Infrared Continuum Emission of Visual Reflection Nebulae,” Astrophysical Journal 277, 623–633.ADSCrossRefGoogle Scholar
  8. Soifer, B.T., Houck, J.R., and Neugebauer, G. (1987) “The IRAS View of the Extragalactic Sky,” Annual Review of Astronomy and Astrophysics 25, 187–230ADSCrossRefGoogle Scholar
  9. Soifer, B.T., Sanders, D.B., Madore, B.F., Neugebauer, G., Danielson, G.E., Elias, J.H., Lonsdale, Carol J., and Rice, W.L. (1987) “The IRAS Bright Galaxy Sample. II. The Sample and Luminosity Function,” Astrophysical Journal 320, 238–257.ADSCrossRefGoogle Scholar
  10. Telesco, C.M. (1988) “Enhanced Star Formation and Infrared Emission in the Centers of Galaxies,” Annual Review of Astronomy and Astrophysics 26, 343–376.ADSCrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • B. T. Soifer
    • 1
  1. 1.California Institute of TechnologyPasadenaUSA

Personalised recommendations