NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-22 T03:19:16 PDT
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For refcode 1988ApJ...335...74B:
Retrieve 229 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1988ApJ...335...74B IRAS OBSERVATIONS OF AN OPTICALLY SELECTED SAMPLE OF INTERACTING GALAXIES HOWARD A. BUSHOUSE, SUSAN A. LAMB, AND MICHAEL W. WERNER Received 1988 March 1; accepted 1988 May 27 ABSTRACT IRAS observations of a large, morphologically selected sample of strongly interacting disk-type galaxies have demonstrated that galaxy-galaxy collisions can lead to enhanced infrared emission, but not in all cases. Infrared luminosities of the interacting galaxies span a large range, but are about a factor of 2 higher, on average, than those of isolated disk galaxies. The data suggest the existence of a cutoff in blue luminosity, below which no galaxies show markedly enhanced infrared emission. Only the most strongly interacting systems in the sample show extreme values of infrared excess, suggesting that deep, interpenetrating collisions are necessary to drive infrared emission to extreme levels. Comparisons with optical indicators of star formation show that infrared excess and color temperatures correlate with the level of star-formation activity in the interacting galaxies. All interacting galaxies in our sample that exhibit an infrared excess and have higher than normal color temperatures also have optical indicators of high levels of star formation. It is not necessary to invoke processes other than star formation to account for the enhanced infrared luminosity in this sample of interacting galaxies. Subject headings: galaxies: interactions - galaxies: stellar content - infrared: sources - stars: formation
Retrieve 229 NED objects in this reference.
Please click here for ADS abstract

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