出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present analysis of 25 years’ worth of archival VLA, VLBA and EVN observations of the Xray
binary Cygnus X-3. From this, we deduce the source proper motion, allowing us to predict the
location of the central binary system at any given time. However, the line of sight is too scatterbroadened
for us to measure a parallactic distance to the source. The measured proper motion
allows us to constrain the three-dimensional space velocity of the system, implying a minimum
peculiar velocity of 9 kms−1. Reinterpreting VLBI images from the literature using accurate core
positions shows the jet orientation to vary with time, implying that the jets are oriented close to
the line of sight and are likely to be precessing.
