146 citations · 160 across the 3 of their papers we have counts for
6 papers
The characteristic blue spectra of accretion disks in quasars as uncovered in the infrared
Makoto Kishimoto, Robert Antonucci, Omer Blaes +4
Quasars are thought to be powered by supermassive black holes accreting surrounding gas. Central to this picture is a putative accretion disk which is believed to be the source of…
The reddest ISO-2MASS quasar
C. Leipski, M. Haas, R. Siebenmorgen +9
In the course of the NIR/MIR AGN search combining the 6.7 mu ISOCAM Parallel Survey and 2MASS we have discovered 24 type-1 quasars about a third of which are too red to be discrimi…
Narrow-line AGN in the ISO-2MASS Survey
C. Leipski, M. Haas, H. Meusinger +9
Context: A long-standing challenge of observational AGN research is to find type 2 quasars, the luminous analogues of Seyfert-2 galaxies. Aims: We search for luminous narrow-line t…
MAMBO 1.25mm observations of 3CR radio galaxies and quasars at z=1.5: On the debate of the unified schemes
Martin Haas, Rolf Chini, Sven Mueller +2
In order to explore the nature of the 850 micron flux difference between powerful radio galaxies and steep radio-spectrum quasars at z=1.5 reported by Willott et al. (2002), we hav…
The ISO-2MASS AGN survey: On the type-1 sources
C. Leipski, M. Haas, H. Meusinger +9
We combined the ISOCAM Parallel Mode Survey at 6.7 micron (LW2 filter) with the Two Micron All Sky Survey in order to obtain a powerful tool to search for AGN independent of dust e…
Dust in 3CR radio galaxies: On the FR1-FR2 difference
S. A. H. Mueller, M. Haas, R. Siebenmorgen +4
We compare three 3CR samples of 11 FR1 galaxies, 17 FR2 galaxies and 18 lobe-dominated quasars contained in the ISO Data Archive. In contrast to the powerful FR2 galaxies with edge…