# A Comprehensive Radio and Optical Study of Abell 2256: Activity from an Infalling Group

@article{Hill2003ACR,
title={A Comprehensive Radio and Optical Study of Abell 2256: Activity from an Infalling Group},
author={Neal Miller Frazer Owen John Hill},
journal={arXiv: Astrophysics},
year={2003}
}
Abell 2256 is a nearby (z~0.06), rich cluster of galaxies with fascinating observed properties across a range of wavelengths. Long believed to represent a cluster merger, recent X-ray and optical results have suggested that in addition to the primary cluster and subcluster there is evidence for a third, poorer system. We present wide-field, high sensitivity 1.4 GHz VLA radio observations of Abell 2256 in conjunction with optical imaging and additional spectroscopy. Over 40 cluster radio…

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## References

SHOWING 1-10 OF 58 REFERENCES
Abell 2255: Increased Star Formation and AGN Activity in a Cluster-Cluster Merger
• Physics
• 2003
Deep VLA 1.4 GHz radio continuum imaging of Abell 2255 is presented. This cluster is among the better nearby candidates for rich cluster-cluster merger systems, with evidence including an elongated
Cluster Mergers as Triggers of Star Formation and Radio Emission: A Comparative Study of the Rich Clusters Abell 2125 and 2645
• Physics
• 1999
We report a detailed optical study of the clusters Abell 2125 and 2645. These clusters are very similar in redshift (z ≈ 0.25) and richness (Abell class 4), yet contrast strongly in blue fraction and
The Radio Galaxy Populations of Nearby Northern Abell Clusters
• Physics
• 2001
We report on the use of the NRAO VLA Sky Survey (NVSS) to identify radio galaxies in 18 nearby Abell clusters. The listings extend from the cores of the clusters out to radii of 3 h Mpc, which
Four Extreme Relic Radio Sources in Clusters of Galaxies
• Physics
• 2001
We describe the results of the highest-resolution radio observations yet made of four relic radio sources in the Abell clusters A13, A85, A133, and A4038. Our Very Large Array images at 1.4 GHz with
A combined optical/X-ray study of the Galaxy cluster Abell 2256
• Physics
• 1989
The dynamics of Abell 2256 is investigated by combining X-ray observations of the intracluster gas with optical observations of the galaxy distribution and kinematics. Magnitudes and positions are
Chandra Observation of A2256: A Cluster at the Early Stage of Merging
• Physics
• 2002
We present Chandra observations of the rich cluster of galaxies A2256. In addition to the known cool subcluster, a new structure (we call it the "shoulder" in this paper, based on its morphology) was
Hubble Space Telescope Near-infrared and Optical Imaging of Faint Radio Sources in the Distant Cluster Cl 0939+4713
• Physics
• 1999
We present deep Hubble Space Telescope Near-Infrared Camera and Multiobject Spectrograph (NICMOS) and Wide Field and Planetary Camera 2 (WFPC2) optical imaging of a small region in the core of the
Radio-selected Galaxies in Very Rich Clusters at z ≤ 0.25. II. Radio Properties and Analysis
• Physics
• 2002
We report on the properties of radio-selected galaxies within 30 very-rich Abell clusters with z . 0.25. The radio, optical, and x-ray data for these clusters were presented in Paper I (Morrison et
An X-ray temperature map of the merging galaxy cluster A2256
• Physics
Nature
• 1994
RICH clusters of galaxies are the largest bound masses in the Uni-verse, but it has been difficult to determine just how massive they are1,2. Observations of the velocities of individual galaxies,
Halo and relic sources in clusters of galaxies
• Physics
• 2000
Abstract New images of 7 radio halos and relics, obtained with the Very Large Array at 20 or 90 cm, are presented here. The existence of a cluster-wide radio halo in the clusters A 665 and CL 0016+16