Effective Radii and Color Gradients in Radio Galaxies

Details Effective Radii and Color Gradients in Radio Galaxies Effective Radii and Color Gradients in Radio Galaxies

1999-03-07

arxiv.org/abs/astro-ph/9903104v1

Astronomy and Astrophysics

Astrophysics

11 pages, 4 figures, (LaTeX: aaspp4, epsfig), to appear in ApJL 1999

Scientific paper

10.1086/311995

We present de Vaucouleurs' effective radii in B and R bands for a sample of Molonglo Reference Catalogue radio galaxies and a control sample of normal galaxies. We use the ratio of the scale lengths in the two bands as an indicator to show that the radio galaxies tend to have excess of blue color in their inner region much more frequently than the control galaxies. We show that the scale length ratio is a useful indicator of radial color variation even when the conventional color gradient is too noisy to serve the purpose.

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