Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-05-23
Astron.Astrophys.456:97-104,2006
Astronomy and Astrophysics
Astrophysics
9 pages, 6 figures, accepted by A&A
Scientific paper
10.1051/0004-6361:20054678
We report on VLBA observations of a gamma-ray bright blazar NRAO 530 at multiple frequencies (5, 8, 15, 22, 39, 43, and 45 GHz) in 1997 and 1999. These multi-epoch multi-frequency high-resolution VLBI images exhibit a consistent core-dominated morphology with a bending jet to the north of the core. The quasi-simultaneous data observed at five frequencies (5, 8, 15, 22 and 43 GHz) in February 1997 enable us to estimate the spectra of compact VLBI components in this highly variable source. Flat spectra are seen in central two components (A and B), and the most compact component A with the flattest spectral index at the south end is identified as the core.
Cai H.-B.
Chen Xingming
Feng Shi-Wei
Huang Ling
Lu R.-S.
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