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VLA Images of Two Extended Radio Galaxies

Published online by Cambridge University Press:  26 May 2016

W. Junor
Affiliation:
Institute for Astrophysics, Univ. of New Mexico, Albuquerque, NM, USA
F. Mantovani
Affiliation:
Istituto di Radioastronomia del CNR, Bologna, Italy
R. Morganti
Affiliation:
Istituto di Radioastronomia del CNR, Bologna, Italy
L. Padrielli
Affiliation:
Istituto di Radioastronomia del CNR, Bologna, Italy

Abstract

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There is some evidence from earlier studies that the two sources 0235 — 197 and 1203 + 043 exhibit low frequency (< 1 GHz) variability. This work shows that both sources have linear polarizations, if any, below the detection limits at 320 MHz, so we cannot explain the variability as being due to instrumental polarization effects as has been suggested for 3C159. Refractive scintillation may be the cause of the variability in 0235—197. The radio source 1203+043 lacks any bright compact component thereby ruling out a refractive scintillation mechanism for its variability. Consequently, it is possible that claims of variability in this source are spurious. However, the 320 MHz VLA observations show that 1203+043 has an ‘X'-shaped radio structure.

Type
Part 4: Extragalactic Radio Sources
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Cerchiara, P.L. et al., 1994, MNRAS, 267, 247 Google Scholar
Mantovani, F. et al., 1992, MNRAS, 257, 353 CrossRefGoogle Scholar
Rickett, B.J., 1986, ApJ, 307, 564 CrossRefGoogle Scholar