Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997acasn..38..397z&link_type=abstract
Acta Astronomica Sinica, vol. 38, p. 397
Astronomy and Astrophysics
Astronomy
1
Bl Lacertae Objects, Very Long Base Interferometry, Rotating Plasmas, Radio Jets (Astronomy), Velocity Measurement, Fine Structure
Scientific paper
The images of BL Lac's AO 0235 + 164 obtained from multi-epoch VLBI observations at 5 GHz are presented. According to the results of VLBI observations, the expanding speeds of components of AO 0235 + 164 have been estimated. The maximum speed is about 27c. We infer that there is a rotation available for the jet of AO 0235 + 164 caused by the precession of the central engine. This inference may be confirmed with new multi-epoch observations. The space VLBI observations, which will be useful in discerning the fine structures of the central component of AO phi235 + 164, are needed. Corresponding simulation tests have been conducted.
Chen Yong-Jun
Zhang Fu-Jun
Zhu Han-Shu
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