The Discovery of 63 Giant Radio Galaxies in the FIRST Survey

2023/11/15 by Soren Ramdhanie, Ramdhanie, Soren, Yjan A. Gordon +7 · 2 voices · 1 citation
#astro-ph.GA #astro-ph.IM

paper · pdf · doi:10.48550/arxiv.2311.09079

Abstract

Giant Radio Galaxies (GRGs) are Active Galactic Nuclei (AGN) with radio emission that extends over projected sizes >0.7 Mpc. The large angular sizes associated with GRGs complicate their identification in radio survey images using traditional source finders. In this Note, we use DRAGNhunter, an algorithm designed to find double-lobed radio galaxies, to search for GRGs in the Faint Images of the Radio Sky at Twenty cm survey (FIRST). Radio and optical images of identified candidates are visually inspected to confirm their authenticity, resulting in the discovery of 63 previously unreported GRGs.

Cited by

• DRAGNs in the Forest: Identifying Artifacts with Random Forest Models in the VLASS DRAGNs Catalog

Discussions

• FIRST discovery of dozens of new giant radio galaxies [lemmy, 49 points, 1 comments]
• Do you like Giant Radio Galaxies? If so you’ll want to read about how our fantastic REU student, Soren Ramdhanie, and co discovered 63 of these cosmic behemoths this summer. Recently accepted to RNAAS [bsky, 4 points, 0 comments]

Related

• A search for giant radio galaxies in recent deep radio surveys
• New Giant Radio Galaxies in the SDSS-JVLA Stripe82 and LoTSS-PDR Survey
• Searching for the Largest Radio Galaxies
• Why do only some Radio Galaxies acquire giant Sizes?
• Discovery of giant radio sources from TGSS ADR 1: radio, optical, and infrared properties