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HST NICMOS Imaging of z ~ 2 to 3 radio-quiet quasars

S. Ridgway·T. Heckman·D. Calzetti·M. Lehnert
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Abstract

We will present the results of a NICMOS H-band imaging survey of a small sample of z ~ 2 to 3 radio-quiet quasars. We have resolved extension in at least 4 of 5 objects and find evidence for a wide range in the morphologies and magnitudes of these hosts. The host galaxy luminosities range from sub-L* to about 4 L*, with most of the hosts having luminosities about L*. These host galaxies have magnitudes and sizes consistent with those of the Ly break galaxies at similar redshifts and at similar rest wavelengths, but are about a magnitude fainter than the comparable 6C radio galaxies. One residual host component is not centered on the quasar nucleus, and several have close companions (within ~10 kpc), indications that these systems are possibly in some phase of a merger process.

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S. Ridgway, T. Heckman, D. Calzetti, M. Lehnert. 1999-11-04. HST NICMOS Imaging of z ~ 2 to 3 radio-quiet quasars. https://doi.org/10.1016/s1387-6473(01)00175-0

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