# GMRT Low-frequency Imaging of an Extended Sample of X-shaped Radio Galaxies

## TL;DR

This study uses GMRT low-frequency imaging to analyze an extended sample of X-shaped radio galaxies, providing insights into their spectral properties and potential formation mechanisms.

## Contribution

It extends previous GMRT studies by including 16 new sources, offering a larger sample to investigate spectral characteristics and formation models of X-shaped radio galaxies.

## Key findings

- No systematic spectral differences between active lobes and off-axis emission.
- Spectral properties are consistent across the extended sample.
- Discussion of twin AGN model as a possible formation mechanism.

## Abstract

We present a low-frequency imaging study of an extended sample of X-shaped radio sources using the Giant Metrewave radio telescope (GMRT) at two frequencies (610 and 240 MHz). The sources were drawn from a Very Large Array FIRST-selected sample and extends an initial GMRT study at the same frequencies, of 12 X-shaped radio galaxies predominantly from the 3CR catalog (Lal & Rao 2007). Both the intensity maps and spectral index maps of the 16 newly observed sources are presented. With the combined sample of 28 X-shaped radio sources, we found no systematic differences in the spectral properties of the higher surface brightness, active lobes versus the lower surface brightness, off-axis emission. The properties of the combined sample are discussed, including the possible role of a twin active galactic nuclei model in the formation of such objects.