IGR J14488-4008: an X-ray peculiar giant radio galaxy discovered by INTEGRAL

TL;DR

This paper reports the discovery of IGR J14488-4008, a giant radio galaxy with unique X-ray spectral features, expanding understanding of the diversity and properties of such extragalactic sources.

Contribution

It presents the first detailed radio and X-ray analysis of this peculiar giant radio galaxy, revealing its classification and unique spectral characteristics.

Findings

The galaxy exceeds 1.5 Mpc in size, confirming it as a giant radio galaxy.

X-ray spectrum shows absorption by ionised elements, rare among similar sources.

Classified as a Seyfert 1.2 galaxy at redshift 0.123.

Abstract

In this paper we report the discovery and detailed radio/X-ray analysis of a peculiar giant radio galaxy (GRG) detected by INTEGRAL, IGR J14488-4008. The source has been recently classified as a Seyfert 1.2 galaxy at redshift 0.123; the radio data denote the source to be a type II Fanaroff-Riley radio galaxy, with a linear projected size exceeding 1.5 Mpc, clearly assigning IGR J14488-4008 to the class of GRG. In the X-rays, the source shows a remarkable spectrum, characterised by absorption by ionised elements, a characteristic so far found in only other four broad line radio galaxies.