Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998newar..42..641p&link_type=abstract
New Astronomy Reviews, Volume 42, Issue 9-10, p. 641-643.
Astronomy and Astrophysics
Astronomy
5
Stars: Individual (Ss433), Ism: Jets And Outflows, Radio Continuum: Stars Copyright: (C) 1998 Elsevier Science B.V. All Rights Reserved.
Scientific paper
We present multi-frequency VLBI observations of SS 433 at 1.6, 5, and 15 GHz. The central region of the source is resolved and shows a double core-wing structure with a central gap, resolvable only at high frequency. Spectral properties of these components indicate that free-free absorption occurs, but only towards the innermost part of the jets. We have also discovered an extended emission region which is nearly perpendicular to the twin jets and has a steep spectrum. Possibly, our observations indicate the presence of a large, flattened structure in the equatorial plane of the system.
Fejes Istvan
Paragi Zs.
Schilizzi Richard T.
Spencer Ralph E.
Stirling Alastair M.
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