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Radio emission and the optical isophotal twist of radio-loud ellipticals

Gopal-Krishna·Amit R. Dhakulkar·Paul J. Wiita·Samir Dhurde
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Abstract

Using the surface photometric analysis data for a well defined sample of 79 nearby radio galaxies (z < 0.12), it is shown that the level of radio emission associated with an elliptical galaxy during the radio-loud phase is related to the presence of large amounts of isophotal twist in its optical image. In particular, radio galaxies with P_408 > 3 x 10^{25} W/Hz appear to show a preference to be associated with elliptical hosts exhibiting an isophotal twist in excess of ~20 degrees.

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Gopal-Krishna, Amit R. Dhakulkar, Paul J. Wiita, Samir Dhurde. 2003-08-29. Radio emission and the optical isophotal twist of radio-loud ellipticals. https://doi.org/10.1051/0004-6361%3A20031329

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