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1999ApJS..123..351L - Astrophys. J., Suppl. Ser., 123, 351-376 (1999/August-0)
HUBBLE SPACE TELESCOPE snapshot survey of 3CR quasars: the data.
LEHNERT M.D., MILEY G.K., SPARKS W.B., BAUM S.A., BIRETTA J., GOLOMBEK D., DE KOFF S., MACCHETTO F.D. and McCARTHY P.J.
Abstract (from CDS):
Our analysis suggests that the quasar fuzz contributes from less than 5% to nearly 100% in the most extreme case (about 20% being typical) of the total light from the quasar, with 16 of the quasars (∼40%) being unresolved according to the analysis of their light profiles (with only 7 being considered unresolved determined by PSF subtraction of the quasar images). The magnitudes of the hosts range from about 18 to more than 21 in the F702W filter and the sizes are typically 1"-2" at a limiting surface brightness of ∼21-22mF702W arcsec–2. Comparisons with the few ground-based images that are available of these sources suggest good overall morphological agreement with the HST images. The 0".1 resolution of the HST PC combination reveals a wide variety of structures in the host galaxies of these quasars. Most of the host galaxies show twisted, asymmetric, or distorted isophotes. About 1/4 of the quasar hosts have close (within a few arcseconds) companions seen in projection and about 1/10 show obvious signs of tidal interactions with a close companion. Finally, using radio images available from the literature, we find that in many of the resolved sources there is a correspondence between the radio and optical morphologies. We find that these sources exhibit a tendency for the principal axes of the radio and optical emission to align similar but perhaps weaker than that observed for radio galaxies. This correspondence also suggests that our methodology for removing the point source contribution from the resolved emission is sound. A more complete analysis of these data and new HST snapshot data will be presented in subsequent papers.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Structure - Galaxies: Quasars: General - Surveys
Simbad objects: 43
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