Journal of Astrophysics and Astronomy

, Volume 32, Issue 4, pp 533–536 | Cite as

Double Relics in the Outskirts of A3376: Accretion Flows Meet Merger Shocks?

  • Ruta Kale
  • K. S. Dwarakanath
  • Joydeep Bagchi
  • Surajit Paul
Article
  • 59 Downloads

Abstract

The case of spectacular ring-like double radio relics in the merging, rich galaxy cluster A3376 is of great interest to study non-thermal phenomena at cluster outskirts. We present the first low frequency (330 and 150 MHz) images of the double relics using the GMRT. With our GMRT 330 MHz map and the VLA 1400 MHz map (Bagchi et al. 2006), we have constructed and analyzed the distribution of spectral indices over the radio relics. We find flat spectral indices at the outer edges of both the relics and a gradual steepening of spectral indices toward the inner regions. This supports the model of outgoing merger shock waves. The eastern relic has a complex morphology and spectral index distribution toward the inner region. This will be discussed in the context of the effect of large-scale accretion flows on the outgoing merger shocks as reported in the recent simulations.

Keywords

Galaxy clusters relics 

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References

  1. Araudo, A. et al. 2008, Mon. Not. R. Astron. Soc., 390, 323.ADSCrossRefGoogle Scholar
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Copyright information

© Indian Academy of Sciences 2011

Authors and Affiliations

  • Ruta Kale
    • 1
    • 2
  • K. S. Dwarakanath
    • 1
  • Joydeep Bagchi
    • 2
  • Surajit Paul
    • 2
  1. 1.Raman Research InstituteBangaloreIndia
  2. 2.Inter-University Centre for Astronomy and AstrophysicsPuneIndia

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