WNB 0313+683: Analysis of a Newly Discovered Giant Radio Galaxy

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dc.creatorSchoenmakers, A. P.
dc.creatorMack, K. -H.
dc.creatorLara, L.
dc.creatorRoettgering, H. J. A.
dc.creatorde Bruyn, A. G.
dc.creatorvan der Laan, H.
dc.creatorGiovannini, G.
dc.date1998-05-28
dc.date.accessioned2026-07-07T02:27:03Z
dc.date.available2026-07-07T02:27:03Z
dc.descriptionWe present the results of a detailed analysis of the newly discovered 15 arcmin large FRII-type radio galaxy WNB 0313+683. It has a redshift of 0.0901 +/- 0.0002 and a projected linear size of 2.0 Mpc. Using multi-frequency radio data from the WENSS and NVSS surveys, the VLA, the WSRT and the 100m Effelsberg telescope, we have derived the age of the source (1.4 +/- 0.1 x 10^8 yrs) and the particle densities around the two radio lobes (>1.6 x 10^(-6) per cubic cm for the southern lobe and >5.8 x 10^(-7) per cubic cm for the northern). From optical spectroscopy we find that the H$α$ emission line has a broad component, and that the extinction is large (with colour index E(B-V) = 0.98 +/- 0.10 mag), but is probably mostly galactic in origin (b= +9.8 degrees). Further, the radio core has an inverted spectrum with a spectral index of +0.42 +/- 0.03, suggesting a very compact structure. At 10.5 GHz, it contributes 25% of the total flux density of the source, which is extremely high for radio galaxies. WNB 0313+683 has a very large optical emission line flux with respect to its estimated jet power, when compared with the correlation between these two properties found by Rawlings & Saunders (1991). We argue that this, together with the relatively high radio power and the inverted radio spectrum of the radio core, is suggestive of a new phase of radio activity in this source.
dc.description26 pages, LaTeX (l-aa30 style, including 5 Tables and 30 figures), Accepted for publication in A&A Main Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/9805356
dc.identifierhttp://arxiv.org/abs/astro-ph/9805356
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12531
dc.subjectAstrophysics
dc.titleWNB 0313+683: Analysis of a Newly Discovered Giant Radio Galaxy
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