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Imaging The Host Galaxies Of High-Redshift Radio-Quiet Qsos, James D. Lowenthal, Timothy M. Heckman, Matthew D. Lehnert, J. H. Elias

Astronomy: Faculty Publications

We present new deep K-band and optical images of four radio-quiet QSOs at z ≈ 1 and six radio-quiet QSOs at z ≈ 2.5, as well as optical images only of six more at z ≈ 2.5. We have examined the images carefully for evidence of extended "fuzz" from any putative QSO host galaxy. None of the z ≈ 2.5 QSOs shows any extended emission, and only two of the z ≈ 1 QSOs show marginal evidence for extended emission. Our 3 σ detection limits in the K images, mK ≃ 21 for an isolated source, would correspond approximately to …