Radio emission and the optical isophotal twist of radio-loud ellipticals
Gopal-Krishna, Amit R. Dhakulkar, Paul J. Wiita, Samir Dhurde
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 P408 > 3 x 1025 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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