Aperture synthesis of the radio structure of SS433

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Maps, Binary Stars, Microwave Emission, Radio Astronomy, Radio Stars, Variable Stars, Polarized Electromagnetic Radiation, Radiant Flux Density, Supernova Remnants, X Ray Sources

Scientific paper

On the epoch July 22, 1979 VLA radio synthesis maps of SS433 showed the existence of radio structure at 1.5 and 4.9 GHz. The structure has size of a few arcseconds and is closely aligned with the bulges of the SNR W50 lying nearly a degree away to the east and west. Thus the observed structure may be due to the hypothesized precessing beams or to flaring activity from the central source, or to both. Linear polarization was detected within less than 0.5 arcsec of the unresolved core at a level of about 1% of the core total intensity at both frequencies, possibly indicating the region where polarized radio radiation is emitted is not Faraday depolarized by coexistent ionized gas.

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