Thermal-infrared imaging of 3C radio galaxies at z 1

Thermal - infrared imaging of 3 C radio galaxies at z ∼ 1

We present the results of a programme of thermal-infrared imaging of nineteen z ∼ 1 radio galaxies from the 3CR and 3CRR (LRL) samples. We detect emission at L (3.8μm) from four objects; in each case the emission is unresolved at 1-arcsec resolution. Fifteen radio galaxies remain undetected to sensitive limits of L ≈ 15.5. Using these data in tandem with archived HST data and near-infrared spec...

Near - infrared imaging of the host galaxies of three radio – loud quasars at z ∼ 1 . 5

We present high spatial resolution near–infrared H-band (1.65 μm) images, taken with ISAAC on UT1 of ESO VLT, of three radio-loud quasars at z∼1.5, as a pilot study for imaging of a larger sample of radio-loud and radio-quiet quasars in the redshift range 1 < z < 2. We are able to clearly detect the host galaxy in two quasars (PKS 0000-177 and PKS 0348-120) and marginally in the third (PKS 0402...

Near - infrared imaging of the host galaxies of three radio – loud quasars at z ∼ 1

We present high spatial resolution near–infrared H-band (1.65 μm) images, taken with ISAAC on UT1 of ESO VLT, of three radio-loud quasars at z∼1.5, as a pilot study for imaging of a larger sample of radio-loud and radio-quiet quasars in the redshift range 1 < z < 2. We are able to clearly detect the host galaxy in two quasars (PKS 0000-177 and PKS 0348-120) and marginally in the third (PKS 0402...

NEAR-INFRARED SPECTROSCOPY OF POWERFUL RADIO GALAXIES AT z\ 2.2È2.6

Near-infrared spectroscopy of eight high-redshift powerful radio galaxies (jrest D 3700È6800 AŽ ) (HzPRGs) at z\ 2.2È2.6 is presented. Strong forbidden lines and Ha emission were detected in all sources ; the data show evidence that the emission lines of the HzPRGs may contribute a substantial fraction (D25%È98%) of their total observed Hand/or K-band light. Diagnostic emission-line ratiosÈ [O ...

HST, radio and infrared observations of 28 3CR radio galaxies at redshift z