Dynamical Age vs Spectral Age of the Lobes of Selected Giant Radio Sources (GRSs)

Details Dynamical Age vs Spectral Age of the Lobes of Selected Giant Radio Sources (GRSs) Dynamical Age vs Spectral Age of the Lobes of Selected Giant Radio Sources (GRSs)

2009-05-05

arxiv.org/abs/0905.0676v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

To appear in ASP Conference Series, Vol. 407, The Low-Frequency Radio Universe, eds D. J. Saikia, D. A. Green, Y. Gupta and T.

Scientific paper

Dynamical ages of the opposite lobes determined {\sl independently} of each other suggest that their ratios are between $\sim$1.1 to $\sim$1.4. Demanding similar values of the jet power and the radio core density for the same GRS, we look for a {\sl self-consistent} solution for the opposite lobes, which results in different density profiles along them found by the fit. A comparison of the dynamical and spectral ages shows that their ratio is between $\sim$1 and $\sim$5, i.e. is similar to that found for smaller radio galaxies. Two causes of this effect are pointed out.

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