Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134

Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134
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PKS 0528 134 的准同时五频 VLBA 观测

DOI:
10.1051/0004-6361:20065094
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发表时间:
2006-08
影响因子:
6.5
通讯作者:
Shang, L. -L.
Shang, L. -L.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shen, Z. -Q.;Chen, X.;Cai, H. -B.;Shang, L. -L.

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We present results of Very Long Baseline Array (VLBA) observations of PKS 0528+134 at five frequencies (2.3, 5.0, 8.4, 15.4, and 22.2 GHz). These quasi-simultaneous data enable us to study the spectral distribution of Very Long Baseline Interferometer (VLBI) components for the first time in this highly variable source, from which the central compact core is identified. Our observations indicate that there are two bendings for the jet motion at parsec scale. We provide an approximate spatial fit to the curved jet trajectory using the Steffen et al. (1995) helical model. We further investigate the proper motions of three jet components, which all show superluminal motion. At high frequencies (15.4 and 22.2 GHz) we detected a new component, which is estimated to be related to a radio burst peaking at about 2000.
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