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Simulated optical images of galaxies at z about 1 using ultraviolet images of nearby galaxiesUltraviolet sounding rocket images of several nearby galaxies are used to simulate the appearance in optical bandpasses of similar systems at redshifts z = 0.5-2.67, as observed by the WFPC on HST and by ground-based instruments. Since the morphology of galaxies is a strong function of the wavelength, the appearance of galaxies at large redshifts is subjected to a large k-correction effect. The strong dependence of monochromatic surface brightness on redshift also implies that observed morphology of distant systems will be crucially dependent on the limiting surface brightness set by the sky background. Although the angle subtended by sources depends only weakly on z, the fraction of a galaxy whose surface brightness is above the detection threshold varies strongly with z. Morphological distinctions of spiral from elliptical, spiral from irregular, and barred from unbarred types become more difficult, as does accurate evaluation of interactions or of the local environment.
Document ID
19910040730
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bohlin, Ralph C.
(Space Telescope Science Institute Baltimore, MD, United States)
Cornett, Robert H.
(Space Telescope Science Inst. Baltimore, MD, United States)
Hill, Jesse K.
(Space Telescope Science Inst. Baltimore, MD, United States)
Hill, Robert S.
(Space Telescope Science Inst. Baltimore, MD, United States)
Landsman, Wayne B.
(ST Systems Corp. Lanham, MD, United States)
O'Connell, Robert W.
(Virginia, University Charlottesville, United States)
Neff, Susan G.
(Space Telescope Science Inst. Baltimore, MD, United States)
Smith, Andrew M.
(Space Telescope Science Inst. Baltimore, MD, United States)
Stecher, Theodore P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
February 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 368
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A25353
Funding Number(s)
CONTRACT_GRANT: NAG5-700
Distribution Limits
Public
Copyright
Other

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