| Issue |
A&A
Volume 410, Number 1, October IV 2003
|
|
|---|---|---|
| Page(s) | 139 - 141 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20031329 | |
| Published online | 17 November 2003 | |
Research Note
Radio emission and the optical isophotal twist of radio-loud ellipticals
1
National Centre for Radio Astrophysics, TIFR, Pune University Campus, Pune 411007, India
2
Department of Physics, University of Pune, Pune 411007, India
3
Dept. of Physics and Astronomy, MSC 8R0314, Georgia State University, Atlanta, GA, 30303-3088, USA
Corresponding author: Gopal-Krishna, krishna@ncra.tifr.res.in
Received:
23
April
2003
Accepted:
22
August
2003
Using the surface photometric analysis data for a well defined sample of
79 nearby radio galaxies (
), 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 
W Hz-1 appear to show a preference to be associated with
elliptical hosts exhibiting an isophotal twist in excess of ∼20°.
Key words: galaxies: active / galaxies: elliptical and lenticular / galaxies: formation / galaxies: interactions / galaxies: photometry / radio continuum: galaxies
© ESO, 2003
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