Other
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.8005s&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #80.05; Bulletin of the American Astronomical Society, Vol. 25, p.1418
Other
Scientific paper
3C353, a wide-lobed double source that is the fourth brightest radio galaxy in the 3C Catalog (57 Jy at 1.4 GHz) is associated with an elliptical galaxy in a Zwicky cluster at z=0.0304. Previous VLA observations detected a jet and counterjet, well defined but weak hot spots (typical of sources just above the Fanaroff-Riley Type I to II transition), and a rich complex of large-scale filaments throughout both lobes, which cover over 5 arcmin on the sky. We present sensitive new high-resolution (0.4('') FWHM) images of 3C353 in total and polarized intensity obtained by combining data from the VLA's A,B,C and D configurations at 4.9 GHz. These images reveal further structural complexity in both the jets and the filaments. The jet contains compact linear features oblique to its symmetry axis, and several asymmetrically-placed knots within a smooth, well-collimated envelope of emission. The counterjet is similarly well-resolved and also well-collimated. The filaments contain a hierarchy of transverse scales, with some apparent pairing of sub-filaments (or center-darkening of ribbon-like features). Some filaments are fully-resolved but others contain regions of relatively bright, unresolved substructure. Work is in progress to determine the spectral and polarimetric characteristics of this hierarchy of structures in the filaments. A ``dark spot'' that is prominent on lower-resolution radio images at all radio wavelengths is now seen to be connected to other structure in the east lobe. Its origin remains unclear.
Baum Stefi A.
Bridle Alan H.
Swain Mark Raboin
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