Other
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296..399s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 296, Sept. 15, 1985, p. 399-401.
Other
11
Astronomical Spectroscopy, Galactic Structure, Narrowband, Oxygen Spectra, Quasars, Broadband, Elliptical Galaxies, Galactic Clusters, Red Shift, Spiral Galaxies
Scientific paper
The z = 0.313 quasar 4C 18.68 and its surroundings in the light of redshifted forbidden O III were imaged. The QSO appears much more extended than in broad-band images, with a large halo and possibly a faint tidal tail discerned. A broad-band I CCD image taken in 1 - 1.2 arcsec seeing resolves the QSO from a companion galaxy 3.6 arcsec distant, similar to many others seen in the field. It is suggested that the elongated and asymmetric shapes of some QSOs may be due to not-quite-resolved companion galaxies, and that caution be exercised in interpreting luminosity and color profiles as evidence for underlying spiral or elliptical structure.
Albrecht Roland
Moffat Anthony F. J.
Shara Michael M.
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