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SS433: Periodic Changes in the Radio Structure of Scale Size 1016 cm

Published online by Cambridge University Press:  14 August 2015

A. E. Niell ,
T. G. Lockhart ,
R. A. Preston  and
D. C. Backer
A. E. Niell
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
T. G. Lockhart
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
R. A. Preston
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
D. C. Backer
Affiliation:
University of California, Berkeley, California

Extract

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Radio observations have clearly demonstrated that the kinematic twin-jet model (Milgrom 1979; Abell and Margon 1979) is the correct description of the general behavior of SS433 and have determined the orientation parameters that could not be obtained from the optical observations (Gilmore and Seaquist 1980; Hjellming and Johnston 1981 (HJ); Niell, Lockhart, and Preston 1981 (NLP)). Figure 1 shows the observed position angle of the radio jet at a distance of approximately from the core during the period 1979 May to 1981 May as determined from our VLBI measurements at 2.3 GHz. The mean position angle is 98°±2° for a 20° half-angle cone of precession about an inclination of 79° to the line of sight. The phase is consistent with the expected propagation time out to (1016cm) at a speed of 0.26c for a distance to SS433 of 5 kiloparsecs (HJ; NLP).

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 207 - 208
Copyright
Copyright © Reidel 1982 

References

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