Polarization variability of extragalactic radio sources at 1435 MHz

LUNA, H. ; MARTÍNEZ, R.; COMBI, J. A. ; ROMERO, G. E.

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: Paris; Año: 1993 vol. 269 p. 77 - 82

0004-6361

Four months of radiopolarimetric observations at 1435 MHz of the extragalactic radio sources PKS 0438-436, PKS 0521-365, and PKS 0537-441 are presented. All three sources showed variability of flux density, polarization degree, and position angle. PKS 0521-365 displayed a linear rotation of the p.a. during the four months of observations, with a rate of the rotation of 4.8 deg per day. This rotation is interpreted in the context of a shock in a relativistic jet model, with helical configuration. The flux density, polarization degree, and position angle variations of this source are as predicted by the model of Koenigl and Choudhuri (1985).