Radio Relics in Clusters of Galaxies: A unique case of Abell 548b

Авторы

  • G. Tsarevsky Astro Space Center, Academy of Science, 84/32 Profsoyuznaya St., Moscow, 117910 Russia; Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 1710, Australia
  • L. Feretti INAF Istituto di Radioastronomia, via P. Gobetti 101, I–40129 Bologna, Italy
  • H. Andernach Departamento de Astronom´ıa, Universidad de Guanajuato, AP 144, Guanajuato CP 36000, Mexico
  • M. Bacchi INAF Istituto di Radioastronomia, via P. Gobetti 101, I–40129 Bologna, Italy
  • O.B. Slee Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 1710, Australia
  • G. Giovannini Dipartimento di Astronomia, Univ. Bologna, via Ranzani 1, I-40127 Bologna, Italy; INAF Istituto di Radioastronomia, via P. Gobetti 101, I–40129 Bologna, Italy
  • F. Govoni INAF Istituto di Radioastronomia, via P. Gobetti 101, I–40129 Bologna, Italy; INAF Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra, Italy

Аннотация

Currently about 30 clusters of galaxies are known to have diffuse radio sources (so-called relics), but detailed studies are available for only a few. A548b, a rich and X-ray bright cluster of galaxies, is one of only three clusters (together with A3376 and A3667) known to contain two relics. From our investigation based on multi-wavelength ATCA and VLA observations, we found that both relics (A and B), located on the same side of the cluster’s center, show similar flux, extent, shape, high level of polarization and very steep spectral index. We conclude that these sources are likely related to the merger activity in the cluster. We have also possibly detected a centrally projected third relic (C). If confirmed, it would make A548b a unique triple-relic cluster.

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Опубликован

2007-07-01

Как цитировать

Tsarevsky G., Feretti L., Andernach H., и др., 2007. Известия Крымской астрофизической обсерватории, Т. 103, № 3, С. 37–42. Доступно на: https://jn.craocrimea.ru/index.php/izvcrao/article/view/230 (Дата доступа: 22 сентябрь 2023)

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