A multi-frequency study of the candidate doubledouble radio galaxy J2349?0003 with a possible misalignment
Radio continuum: galaxiesgalaxies: active
We present a multi-frequency analysis of the candidate doubledouble radio galaxy (DDRG) J2349?0003, exhibiting a possible lobe misalignment. High-resolution uGMRT observations at Bands 3 and 4 reveal a complex radio morphology featuring a pair of inner and outer lobes, and the radio core, while the Band 5 image detects the core and the compact components. The positioning of both pairs of lobes with the central core supports its classification as a DDRG. Spectral age estimates for the inner and outer lobes indicate two distinct episodes of active galactic nucleus (AGN) activity interspaced by a short quiescent phase. The possible compact steep-spectrum nature of the core, together with its concave spectral curvature, suggests ongoing or recent jet activity, suggesting the possibility that J2349?0003 may be a candidate triple-double radio galaxy. With a projected linear size of 1.08 Mpc, J2349?0003 is classified as a giant radio galaxy (GRG), although its moderate radio power (?1024 WHz-1) suggests a sparse surrounding environment. Arm-length (R?) and flux density ratios (RS) indicate environmental influences on source symmetry. The observed lobe misalignment and the presence of nearby galaxies in the optical image suggest that merger-driven processes may have played a key role in shaping the sources evolution. Indian Academy of Sciences 2025.
Sudheesh, T.P.; Kale, Ruta; Jithesh, V.; Ishwara-Chandra, C.H.; Jacob, Joe
Journal of Astrophysics and Astronomy;Volume;46;Issue;2;Article No.;74;
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https://doi.org/10.1007/s12036-025-10102-7 https://www.scopus.com/pages/publications/105018192015?origin=resultslist
Sudheesh T.P., Department of Physics and Electronics, Christ University, Hosur Main Road, Bengaluru, 560029, India; Kale R., National Centre for Radio Astrophysics, TIFR, Post Bag No. 3, Ganeshkhind, Pune, 411007, India; Jithesh V., Department of Physics and Electronics, Christ University, Hosur Main Road, Bengaluru, 560029, India; Ishwara-Chandra C.H., Department of Physics and Electronics, Christ University, Hosur Main Road, Bengaluru, 560029, India; Jacob J., Newman College, Thodupuzha, 685584, India