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Ultraluminous infrared galaxies

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.

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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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URLURL TypeDescription
Sanders, D. B.0000-0002-1233-9998
Scoville, N. Z.0000-0002-0438-3323
Madore, B. F.0000-0002-1576-1676
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
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74656
Deposited By: Tony Diaz
Deposited On:02 Mar 2017 03:45
Last Modified:09 Mar 2020 13:19

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