Abstract
view Abstract Citations (9) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the extendedness of faint ultraviolet excess quasar candidates Edwards, G. ; Borra, E. F. ; Hardy, E. Abstract A search for UV excess quasars based on deep U, J, and F plates taken with the Canada-France-Hawaii telescope has been conducted. The plates were fully digitized and analyzed with automated software. After applying a technique for separating stars from galaxies, the surprising result was obtained that a significant fraction of the quasar candidates are not starlike. The extendedness of most (but not all) of these objects is not detectable by ordinary eye inspection. The possible nature of these objects is briefly discussed, concluding that a simple explanation is that they are compact blue galaxies. In this case, quasar counts based uniquely on the ultraviolet excess criterion have overestimated the surface density of faint quasars (B greater than 21) by more than a factor of 2. The possibility that these objects may be quasar remnants is also raised Publication: The Astrophysical Journal Pub Date: February 1985 DOI: 10.1086/162905 Bibcode: 1985ApJ...289..446E Keywords: Image Processing; Quasars; Radiant Flux Density; Spectral Energy Distribution; Ultraviolet Spectra; Compact Galaxies; Density Distribution; Surface Properties; Astrophysics full text sources ADS |
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