New Giant Radio Galaxies in the SDSS-JVLA Stripe82 and LoTSS-PDR Survey

TL;DR

This paper reports the discovery of seven new giant radio galaxies from recent large-scale radio surveys, significantly expanding the known population of these rare astronomical objects.

Contribution

It introduces new giant radio galaxies identified in the SDSS-JVLA Stripe82 and LoTSS-PDR surveys, enhancing the catalog of known GRGs.

Findings

Seven new giant radio galaxies discovered.

Significant increase in known GRGs from recent surveys.

Demonstrates effectiveness of survey-based search methods.

Abstract

Extragalactic radio sources with projected linear size larger than one Megaparsec 1 Mpc = 3.09e22 m = 3.3e6 light years) are called Giant Radio Galaxies (GRGs) or quasars (GRQs). Over the past few years our search for such objects by visual inspection of large-scale radio surveys like the NRAO VLA Sky Survey (NVSS) and Faint Images of the Radio Sky at Twenty Centimeters (FIRST) has allowed us to quadruple the number of GRGs published in literature. Here we report the discovery of 7 new GRGs in two recent surveys, the JVLA 1-2 GHz Snapshot Survey of SDSS Stripe82 and the 150-MHz LOFAR Two-metre Sky Survey Preliminary Data Release (LoTSS-PDR).