Spectral Indices and Particle Ageing Studies on the Giant Radio Galaxy NGC6251

  • K.-H. Mack
  • U. Klein
  • L. Saripalli
  • A. G. Willis
  • C. P. O’Dea
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 175)

Abstract

In the framework of our high-frequency survey of giant radio galaxies with the Effelsberg 100-m telescope (Klein et al., 1994; Saripalli et al., 1995) we have obtained radio continuum maps of NGC6251, a source of 1.5 Mpc size (H0 = 75 km s −1 Mpc −1). Together with low-frequency WSRT observations (Willis & O’Dea, 1990), these measurements form a unique data base which for the first time allows thorough studies of the spectral index over a large frequency range. Theoretical models of particle ageing have been fitted to the spectrum to determine particle ages and other relevant physical parameters. Because of the immense size of NGC6251 these numbers provide information about the physics of the surrounding intergalactic medium.

Keywords

Spectral Index Break Frequency Extragalactic Radio Source Energy Magnetic Field Large Frequency Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • K.-H. Mack
    • 1
  • U. Klein
    • 1
  • L. Saripalli
    • 1
    • 2
  • A. G. Willis
    • 3
  • C. P. O’Dea
    • 4
  1. 1.Radioastronomisches Institut der Universität BonnBonnGermany
  2. 2.Indian Institute of AstrophysicsBangaloreIndia
  3. 3.Dominion Radio Astrophysical ObservatoryPentictonCanada
  4. 4.Space Telescope Science InstituteBaltimoreUSA

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