منابع مشابه
Temperature Map of the Merging Cluster Abell 2255
We present a spatially resolved map of intracluster gas temperatures in the rich cluster Abell 2255, using ROSAT PSPC data. The intracluster gas is strongly non-isothermal and the temperature distribution supports the conclusions of Burns et al. (1995) that Abell 2255 is currently undergoing a merger. The hottest regions are near the core, northwest of the center. A map of the ratio of softer t...
متن کاملThe intracluster magnetic field power spectrum in Abell 2255
Aims. The goal of this work is to constrain the strength and structure of the magnetic field in the nearby cluster of galaxies A2255. At radio wavelengths A2255 is characterized by the presence of a polarized radio halo at the cluster center, a relic source at the cluster periphery, and several embedded radio galaxies. The polarized radio emission from all these sources is modified by Faraday r...
متن کاملThe radio and X - ray properties of Abell 2255
New radio and X-ray data are reported for the rich cluster Abell 2255. The cluster radio emission is characterized by the presence of a diffuse halo source, located at the cluster center, and a more peripheral ridge of radio emission which could be a relic. In addition, 6 tailed radio sources and a small double are found to be associated with cluster galaxies. At X-ray wavelengths, the cluster ...
متن کاملRadio spectral study of the cluster of galaxies Abell 2255
Context. Spectral index studies of halos, relics, and radio galaxies provide useful information on their origin and connection with merger processes. Aims. We present WSRT multi-wavelength observations of the galaxy cluster Abell 2255 at 25 cm, 85 cm, and 2 m. The spectral index images allowed us to study the integrated spectrum of halo and relic and to investigate the physical properties of th...
متن کاملAbell 2255: Increased Star Formation and AGN Activity in a Cluster-Cluster Merger
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 X-ray morphology, the presence of a radio halo, and substructure present in its galaxy distribution. Our radio observations reach an rms sensitivity of ∼ 40μJy beam, enabling us to detect (at 5σ) sta...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab9a2f