Other
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1928b&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, Dec. 1991, p. 1928-1932, 2122-2126.
Other
10
Galactic Structure, Quasars, Radio Spectra, Cosmic Gases, Emission Spectra, Line Spectra
Scientific paper
Deep imaging in two bands of five high-luminosity steep-spectrum radio QSOs is presented. The set of broadband filters used has been specifically designed to exclude contamination from all strong emission lines found in extended emission regions around QSOs. A simple technique for detecting asymmetric structure close to the QSO by using a rotational average of the QSO profile itself is used. This technique makes it possible to examine the region immediately surrounding the QSO, and at least one new galaxy and several other features not evident on the present original images were detected. All five objects show either close companions or substantial host-galaxy asymmetries; these results support the view that interactions are important in luminous QSOs, but the lack of a suitable control sample makes it impossible to give quantitative statistical substance to this statement. Companion galaxies span the whole available color range, while diffuse extensions from two of the QSOs are both quite blue; this last result, however, could well be the result of observatioanal bias.
Block David L.
Stockton Alan
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