169 citations · 1.3k across the 29 of their papers we have counts for
12 papers · 1 filter
Revealing the heavily obscured AGN population of High Redshift 3CRR Sources with Chandra X-ray Observations
Belinda J. Wilkes, Joanna Kuraszkiewicz, Martin Haas +12
Chandra observations of a complete, flux-limited sample of 38 high-redshift (1<z<2), low-frequency selected (and so unbiased in orientation) 3CRR radio sources are reported. The sa…
Complete infrared spectral energy distributions of mm detected quasars at z>5
C. Leipski, K. Meisenheimer, F. Walter +7
We present Herschel far-infrared (FIR) photometry of eleven quasars at redshift z>5 that have previously been detected at 1.2mm. We perform full spectral energy distribution (SED)…
The extended narrow-line region of two type-I quasi-stellar objects
Semyeong Oh, Jong-Hak Woo, Vardha N. Bennert +4
We investigate the narrow-line region (NLR) of two radio-quiet QSOs, PG1012+008 and PG1307+085, using high signal-to-noise spatially resolved long-slit spectra obtained with FORS1…
Extreme host galaxy growth in powerful early-epoch radio galaxies
Peter Barthel, Martin Haas, Christian Leipski +1
During the first half of the universe's age, a heyday of star-formation must have occurred because many massive galaxies are in place after that epoch in cosmic history. Our observ…
The dust emission of high-redshift quasars
C. Leipski, K. Meisenheimer
The detection of powerful near-infrared emission in high redshift (z>5) quasars demonstrates that very hot dust is present close to the active nucleus also in the very early univer…
AMUSE-VIRGO. III: mid-infrared photometry of early-type galaxies and limits on obscured nuclear emission
Christian Leipski, Elena Gallo, Tommaso Treu +3
We complete our census of low-level nuclear activity in Virgo Cluster early-type galaxies by searching for obscured emission using Spitzer Space Telescope mid-infrared (MIR) imagin…