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The Westerbork Northern Sky Survey (WENSS) I. A 570 square degree Mini-Survey around the North Ecliptic Pole ?

The Westerbork Northern Sky Survey (WENSS) is a low-frequency radio survey that will cover the whole sky north of delta = 30 degrees at a wavelength of 92 cm to a limiting flux density of…
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The Infrared Astronomical Satellite (IRAS) mission

The Infrared Astronomical Satellite (IRAS) consists of a spacecraft and a liquid helium cryostat that contains a cooled IR telescope. The telescope's focal plane assembly is cooled to less than 3 K,…
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On the nature and implications of starburst-driven galactic superwinds

Optical spectroscopic data are presented on the ionized nebulae associated with 14 galaxies that are strong far-IR emitters. It is found that the data provide both qualitative and quantitative…
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The central dusty torus in the active nucleus of NGC 1068

Interferometric mid-infrared observations that spatially resolve dust structures in the galaxy NGC 1068 reveal warm dust in a structure 2.1 parsec thick and 3.4 parsec in diameter, surrounding a smaller hot structure.
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The structure of extended extragalactic radio sources

The observational properties of extragalactic radio sources of sizes comparable with or greater than a typical galactic diameter and intrinsic luminosities at 408 MHz greater than 10 to the 23rd W/Hz…
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Infrared Seyferts: a new population of active galaxies?

A Seyfert spectrum is one of the most important indicators of nuclear activity in galaxies. It is characterized by broad emission lines with high ionization. Most known Seyferts have been found…
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Advanced Camera for Surveys Photometry of the Cluster RDCS 1252.9–2927: The Color-Magnitude Relation at z = 1.24

We investigate the color-magnitude (CM) relation of galaxies in the distant X-ray-selected cluster RDCS 1252.9-2927 at z = 1.24 using images obtained with the Advanced Camera for Surveys on the…
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Protoclusters associated with z > 2 radio galaxies - I. Characteristics of high redshift protoclusters

We present the results of a large program conducted with the Very Large Telescope and augmented by observations with the Keck telescope to search for forming clusters of galaxies near powerful radio…
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Radio Continuum Imaging of High-redshift Radio Galaxies

We present sensitive radio continuum observations at high resolution of 37 radio galaxies at z > 2. The observations were made with the Very Large Array (VLA) at 4.7 and 8.2 GHz, with typical…
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Sub-millijansky 1.4 GHz source counts and multicolor studies of weak radio galaxy populations

On presente un catalogue de 124 sources observees a 21 cm avec la VLA; 93 d'entre elles constituent un echantillon complet au niveau 5σ. On presente les comptages des sources a 1462 MHz. On verifie…
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