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Optical nebulosity in X-ray-selected, early type galaxiesThis paper presents the results of an H-alpha + N II forbidden line narrowband imaging survey of X-ray-selected E and S0 galaxies. A novel technique is described for objectively optimizing the removal of stellar continuum light while providing well-defined estimates of systematic errors. The procedure has the additional benefit of eliminating sky contamination, specifically in image regions occupied by galaxy light. Consideration of the measured spectral energy distributions is included in the flux calibration procedure, and emission-line luminosities (or upper limits), corrected for Galactic foreground extinction, are tabulated for metric apertures. No connection is found between the 'boxiness' or 'diskiness' of stellar isophotes and emission-line or far-infrared luminosity. It is suggested that optical nebulosity in early-type galaxies contains a significant multiparameter dependence on active Galactic nuclei behavior, accretion from the hot interstellar medium, and mass injection from external sources.
Document ID
19910069485
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Shields, Joseph C.
(California, University Berkeley, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1991
Publication Information
Publication: Astronomical Journal
Volume: 102
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
91A54108
Funding Number(s)
CONTRACT_GRANT: NSF AST-90-03829
CONTRACT_GRANT: NAS7-918
CONTRACT_GRANT: NSF AST-86-14510
Distribution Limits
Public
Copyright
Other

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