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Chapter and Conference Paper
Radio Galaxies in Cooling Cores: Insights from a Complete Sample
We have observed a new, complete, cooling-core sample with the VLA, in order to understand how the massive black hole in the central galaxy interacts with the local cluster plasma. We find that every cooling c...
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Article
GMRT detection of HI 21 cm-line absorption from the peculiar galaxy in Abell 2125
Using the recently completed Giant Meterwave Radio Telescope, we have detected the HI 21 cm-line absorption from the peculiar galaxy C153 in the galaxy cluster Abell 2125. The HI absorption is at a redshift of...
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Chapter
Hst Observations of Abell 2125: Radio Emission and the Butcher-Oemler Effect
We have surveyed more than 40 Abell clusters at redshifts z ≥ 0.2 with the VLA at 20cm down to radio powers of P20cm ~ 1022 W Hz-1. For P20cm > 1023, the radio luminosity function (RLF) is dominated by nuclear/AG...
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Article
HST Observations of Abell 2125: Radio Emission and the Butcher-Oemler Effect
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Chapter and Conference Paper
Butcher-Oemler Effect and Radio Continuum
The Abell clusters 2125 and 2645 have been imaged in the radio at 20 cm to the same luminosity limit using the Very Large Array. Both the clusters are very similar in richness and redshift, but Abell 2125 has ...
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Chapter and Conference Paper
Radio Sources in Clusters of Galaxies
Since the Albuquerque IAU meeting, most of the advances in the understanding of radio sources in clusters has come from combining radio observations with x-ray and optical data. The x-ray images from Einstein and...
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Article
A counterjet in the elliptical galaxy M87
JETS in radio galaxies have a variety of observed morphologies, in particular appearing in both one-sided and two-sided forms. It is not known whether jets can be intrinsically one-sided, or if the one-sided a...
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Chapter
Preliminary Results of the 20-CM VLA Survey of Abell Clusters
During the past three years, we have been conducting a 20-cm radio frequency continuum survey of Abell clusters using the NRAO VLA. The survey consists of clusters which meet the following criteria:
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Chapter
Near Infrared and Radio Observations of Distant Galaxies
This paper is concerned with the distant radio galaxies in a sample of bright sources selected at 178 MHz by Laing, Riley & Longair (1982). This sample is 96% complete for sources with θ < 10′ and the bias of ...
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Chapter
A Comparison of the Structures of 3CR Quasars and Blank Field Radio Sources
The purpose of this communication is to update our knowledge of the radio structural properties of quasars and blank field radio sources (blank field ≡ any radio source without an identification on the Palomar...
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Chapter
VLBI Observations of M87
On 1980 February 20 we conducted an 8-station intercontental VLBI experiment in order to study the nucleus and jet of M87 at 1666.6 MHz in right circular polarization. Our array was sensitive to structures fro...
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Chapter
Redshift Estimates for Distant Radio Galaxies Based on Broadband Photometry
Calculations modeling the effects of stellar evolution on elliptical galaxies (e.g., Bruzual and Kron 1980, Bruzual 1981) suggest that the shape of the spectral flux distribution should remain almost constant ...
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Article
Absorption lines in the optical spectrum of quasar AO0827+24
IN January 1977 the radio source AO0827+24 (ref. 1) was observed at 90 GHz by F. Owen, S. Mufson, R. Porcas and T. Moffett with the NRAO 36-foot antenna at Kitt Peak, during observations of several flat spectr...
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Article
Another major change in the radio source associated with Cyg X-1
THE sudden appearance1,2 of a faint radio source inside the probable position region for the X-ray source Cyg X-1 was associated with major changes in the X-ray emission observed3 during the period February–May 1...
