The Astrophysical Journal Supplement Series

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The Astrophysical Journal Supplement Series Volume 138 Number 1 Create an alert RSS this journal

H. A. Bushouse et al. 2002 ApJS 138 1 doi:10.1086/324019

Ultraluminous Infrared Galaxies: Atlas of Near-Infrared Images*

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H. A. Bushouse1, K. D. Borne2, L. Colina3, R. A. Lucas1, M. Rowan-Robinson4, A. C. Baker5, D. L. Clements5, A. Lawrence6 and S. Oliver7

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Abstract References Cited By

A sample of 27 ultraluminous infrared galaxy (ULIRG) systems has been imaged at 1.6 μm using the Hubble Space Telescope (HST) Near Infrared Camera and Multi-Object Spectrometer (NICMOS). These ULIRGs are from a larger sample also imaged with HST in the I band. Images and catalog information for the NICMOS subsample, as well as brief morphological descriptions of each system are presented. Inspection of the infrared images and a comparison with optical images of these systems shows that at least 85% are obviously composed of two or more galaxies involved in a close interaction or merger event, with as many as 93% showing some signs of interaction history. Approximately 37% of the systems show either spectroscopic or morphological characteristics of an active galactic nucleus. The infrared morphologies of these systems are generally less complicated or disturbed than their optical morphologies, indicating that some of the small-scale features seen in optical images are likely due to complicated patterns of dust obscuration, as well as widely distributed star formation activity. In some systems the high-resolution HST infrared images have revealed nuclear remnants that are obscured or unidentified in ground-based imaging, which has led to changes in previously determined interaction stage classifications or system content. In general, however, the NICMOS images support previous conclusions from previous HST optical imaging.


Footnote
*  Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.
Subject headings

atlases; galaxies: interactions; galaxies: peculiar; galaxies: starburst; infrared: galaxies; surveys


Dates

Issue 1 (2002 January)

Received 2001 April 24, accepted for publication 2001 August 27



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