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Published May 1987 | Published
Book Section - Chapter Open

Near-infrared observations of IRAS minisurvey galaxies

Abstract

Near infrared photometry at J, H, and K was obtained for 82 galaxies from the IRAS minisurvey. The near infrared colors of these galaxies cover a larger range in J-H and H-K than do normal field spiral galaxies, and evidence is presented of a tighter correlation between the near and far infrared emission in far infrared bright galaxies than exists between the far infrared and the visible emission. These results suggest the presence of dust in the far infrared bright galaxies, with hot dust emission contributing to the 2.2 ┬Ám emission, and extinction by dust affecting both the near infrared colors and the visible luminosities. In addition, there is some indication that the infrared emission in many of the minisurvey galaxies is coming from a strong nuclear component.

Additional Information

The authors extend special thanks to C. G. Wynn-Williams for helpful suggestions on a preliminary version of the manuscript. We also thank E. E. Becklin, J. N. Heasley, G. J. Hill, and C. G. Wynn-Williams of the Institute for Astronomy, University of Hawaii, for generously supplying a number of the redshifts used in this analysis, and Steve Bales, also of the Institute for Astronomy, University of Hawaii, for providing radio positions to clear up several positional ambiguities. The research presented in this paper was supported in part by the National Science Foundation grant AST 83-12699.

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