Sanders, D. B. and Soifer, B. T. and Neugebauer, G. and Scoville, N. Z. and Madore, B. F. and Danielson, G. E. and Elias, J. H. and Matthews, K. and Persson, C. J. and Persson, S. E. (1987) Ultraluminous infrared galaxies. In: Star formation in galaxies. NASA Conference Publication. No.2466. NASA , Washington, DC, pp. 411-420. https://resolver.caltech.edu/CaltechAUTHORS:20170301-143909957
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Abstract
The IRAS survey of the local universe (z≾0.1) has revealed the existence of a class of ultraluminous infrared galaxies with L(8-1000μm) > 10^(12)L⊙ that are slightly more numerous, and as luminous as optically selected quasars at similar redshift. Optical CCD images of these infrared galaxies show that nearly all are advanced mergers. Millimeter-wave CO (1 → 0) observations indicate that these interacting systems are extremely rich in molecular gas with total H_2 masses 1-3 x 10^(10) M⊙. Nearly all of the ultraluminous infrared galaxies show some evidence in their optical spectra for nonthermal nuclear activity. It is proposed that their infrared luminosity is powered by an embedded active nucleus and a nuclear starburst both of which are fueled by the tremendous reservoir of molecular gas. Once these merger nuclei shed their obscuring dust, allowing the AGN to visually dominate the decaying starburst, they become the optically selected quasars.
| Item Type: | Book Section | ||||||||
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| Additional Information: | This research was funded partially by NASA under the IRAS extended mission program and partially by the NSF. | ||||||||
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| Series Name: | NASA Conference Publication | ||||||||
| Issue or Number: | 2466 | ||||||||
| Record Number: | CaltechAUTHORS:20170301-143909957 | ||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170301-143909957 | ||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||
| ID Code: | 74656 | ||||||||
| Collection: | CaltechAUTHORS | ||||||||
| Deposited By: | Tony Diaz | ||||||||
| Deposited On: | 02 Mar 2017 03:45 | ||||||||
| Last Modified: | 09 Mar 2020 13:19 |
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