The Small Wide Angle Tail NGC4874 in the Center of Coma Cluster

  • L. Feretti
  • G. Giovannini
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


NGC4874, one of the two dominant galaxies of the Coma cluster, is associated with a radio source of the Wide Angle Tail (WAT) type (Fig. 1), on a very small angular scale (Feretti and Giovannini 1985). The total linear extent, from the core to each tail edge, is ∼7 kpc (Ho= 100 km s-1 Mpc-1), and the radio structure is all contained within the optical boundary of the galaxy (Fig. 2). The total power of the radio source at 1.5 GHz is Log P1.5=23.06 W/Hz; the core is very weak: S5=0.9 mJy, which corresponds to a power Log P5=20.76 W/Hz. This value is lower than that expected on the basis of the correlation Pcore - Ptot found for radio galaxies (Feretti et al. 1984); however, it is still in agreement with this correlation, due to its large dispersion.


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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • L. Feretti
    • 1
  • G. Giovannini
    • 1
  1. 1.Istituto di RadioastronomiaBolognaItaly

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