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NICMOS observations of luminous & ultraluminous infrared galaxies

Evans, Aaron S. (1999) NICMOS observations of luminous & ultraluminous infrared galaxies. Astrophysics and Space Science, 266 (1). pp. 73-78. ISSN 0004-640X. doi:10.1023/A:1002685211755.

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HST NICMOS observations of a sample of 24 luminous (LIGs: L_(IR)[8-1000 μm] = 10^(11.0-11.99) L_⊙) and ultraluminous (ULIGs:L_(IR) ≳ 10^(12.0) L_⊙) infrared galaxies are presented.The observations provide, for the first time, high resolution HST imaging of the imbedded 1.1 - 2.2 μm nuclear regions of these mergers. All but one of the ULIGs are observed to have at least one compact (50-200 pc) nucleus, and more than half contain what appear to be blue star clusters. The warm infrared galaxies (i.e., the transition sources) are observed to have bright nuclei which account for most of the light of the galaxy.This, combined with the tendency for the light of ULIGs to become more centrally concentrated as a function of increasing wavelength, implies that most of their energy is generated within a region 50-200 pc across.

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Evans, Aaron S.0000-0003-2638-1334
Additional Information:© 1999 Kluwer Academic Publishers. It is a pleasure to thank my collaborators N. Scoville, N. Dinshaw, M. Rieke, D. Hines, R. Thompson, J. Surace and the NICMOS GTO Team. This research was supported NASA grant NAG 5-3042.
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NASANAG 5-3042
Issue or Number:1
Record Number:CaltechAUTHORS:20170408-133900820
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Official Citation:Evans, A.S. Astrophysics and Space Science (1999) 266: 73. doi:10.1023/A:1002685211755
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75874
Deposited By: 1Science Import
Deposited On:13 Apr 2017 20:28
Last Modified:15 Nov 2021 16:55

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