The appearance of active galactic nuclei (AGN) depends so strongly on orientation that our
current classification schemes are dominated by random pointing directions instead of more …

An R and K′ atlas of the IRAS 1 Jy sample of 118 ultraluminous infrared galaxies (ULIGs)
was presented in a companion paper (our Paper I). The present paper discusses the results …

Abstract Observations with the Wide-Field Camera of the Hubble Space Telescope (HST)
are presented for a representative sample of 20 intrinsically luminous quasars with redshifts …

We test the hypothesis that QSOs are formed via strong tidal interactions or mergers, initially
going through an ultraluminous infrared phase. Our approach is to look for traces of this …

We present the first results from a major HST WFPC2 imaging study aimed at providing the
first statistically meaningful comparison of the morphologies, luminosities, scalelengths and …

We present results from a pilot HST ACS deep imaging study in broadband V of five low-
redshift QSO host galaxies classified in the literature as ellipticals. The aim of our study is to …

We present detailed image analysis of rest-frame optical images of 235 low-redshift (z≲
0.35) Type 1 active galactic nuclei (AGNs) observed with the Hubble Space Telescope. The …

QUASARS are the most luminous objects in the Universe. It has been speculated that they
are the visible evidence for accretion of gas onto supermassive black holes that reside at the …

We present the results of a detailed analysis of the host galaxies of powerful active galactic
nuclei (AGN) as revealed by deep near-infrared imaging. New K-band images have been …

We present the results of a numerical code that combines multi-zone chemical evolution with
1D hydrodynamics to follow in detail the evolution and radial behaviour of gas and stars …