CGCG 292-057 - a radio galaxy with merger-modulated radio activity

TL;DR

This paper reports the discovery of a unique radio galaxy with complex X-shaped structure and signs of recurrent activity, linked to a merger galaxy, providing insights into merger-triggered radio activity.

Contribution

It presents the first detailed analysis of CGCG 292-057, a radio galaxy with combined X-shaped and double-double features, highlighting merger-induced radio activity.

Findings

Exhibits a complex X-shaped radio structure.

Shows signs of recurrent double-double radio activity.

Has low-power, highly polarized outer lobes.

Abstract

We announce the discovery of a unique combination of features in a radio source identified with the merger galaxy CGCG 292-057. The radio galaxy both exhibits a highly complex, X-like structure and shows signs of recurrent activity in the form of double-double morphology. The outer lobes of CGCG 292-057 are characterized by low radio power, P_{1400MHz} \simeq 2 * 10^{24} W\Hz^{-1}, placing this source below the FRII/FRI luminosity threshold, and are highly polarized (almost 20 per cent at 1400 MHz) as is typical of X-shaped radio sources. The host is a LINER-type galaxy with a relatively low black hole mass and double-peaked narrow emission lines. These features make this galaxy a primary target for studies of merger-triggered radio activity.