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Record Details

Record 83 of 28521
Imaging and two-dimensional spectra of the IR-bright galaxy NGC 2146 - A recent low-energy merger?
External Online Source: doi:10.1086/115490
Author and Affiliation:
Hutchings, J. B.(Dominion Astrophysical Observatory, Victoria British Columbia, Canada)
Lo, E.(Dominion Astrophysical Observatory, Victoria, Canada)
Neff, S. G.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Stanford, S. A.(Washburn Observatory, Madison, WI, United States)
Unger, S. W.(Royal Greenwich Observatory, Herstmonceux, United Kingdom)
Abstract: New data are presented on the IR-luminous galaxy NGC 2146 from several sources: direct imaging in B, R, and H-alpha; IR imaging in the J, H, and K bands; long-slit spectroscopy at optical and IR wavelengths; and scanning etalon observations in H-alpha. The results allow measurement of the interstellar extinction in the dust lane, and estimation of the true luminosity of the galaxy and nuclear regions. The spectra indicate that there is no active nucleus, and measure the changing ratio of forbidden to permitted lines across the galaxy. IR images and colors indicate the existence of a significant population of hot young stars in the central regions of the system. The H-alpha velocity maps show the full radial-velocity pattern, and suggest that the system consists of a disturbed disk and a merging or interacting arm which connects to the inner dust and radio structures. Outer H-alpha and H I structures appear to be the earlier remnants of this spiraling merger.
Publication Date: Jul 01, 1990
Document ID:
19900052825
(Acquired Nov 28, 1995)
Accession Number: 90A39880
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astronomical Journal (ISSN 0004-6256); 100; 60-69
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Dominion Astrophysical Observatory; Victoria British Columbia, Canada
NASA Goddard Space Flight Center; Greenbelt, MD, United States
Wisconsin Univ.; Madison, WI, United States
Royal Greenwich Observatory; Herstmonceux, United Kingdom
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ASTRONOMICAL SPECTROSCOPY; GALACTIC STRUCTURE; H ALPHA LINE; INFRARED ASTRONOMY; INFRARED IMAGERY; INFRARED SPECTROSCOPY; INTERSTELLAR EXTINCTION; RADIAL VELOCITY; VELOCITY DISTRIBUTION
Imprint And Other Notes: Astronomical Journal (ISSN 0004-6256), vol. 100, July 1990, p. 60-69.
Availability Source: Other Sources
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