Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cha%26a..23..299c&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 23, Issue 3, p. 299-303.
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
A new high-resolution (~ 2 mas) VLBI hybrid map at a wavelength of 6 cm of the BL Lac Object AO 0235+164 has been produced. The map shows its radio structure to be dominated by a strong, nearly unresolved core, with two weak components, one in the NE, and a much fainter one in the SW. The position angle of the jet component is 66.4°, higher than in previous observations. From the time variation of the flux density, we find that there are probably two periodic variations, a shorter one of 1 ~ 2 yr and a longer one of 3 ~ 5 yr. These two periodicities could be due to the joint action of jet outbursts and jet rotation.
Chen Yong-Jun
Zhang Fu-Jun
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