Multi-Frequency VLBI Observations of NRAO 530

Details Multi-Frequency VLBI Observations of NRAO 530 Multi-Frequency VLBI Observations of NRAO 530

2006-05-23

arxiv.org/abs/astro-ph/0605578v1

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.

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