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

	Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134
	Cai, H. -B.; Shen, Z. -Q.; Chen, X.; Shang, L. -L.
刊名	ASTRONOMY & ASTROPHYSICS
	2006-11-01
卷号	458 期号:3 页码:753-760
关键词	galaxies : jets galaxies : quasars : individual : PKS 0528+134 radio continuum : galaxies
英文摘要	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.
学科主题	星系和宇宙学研究中心
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	COMPACT RADIO-SOURCES ; ACTIVE GALACTIC NUCLEI ; EGRET OBSERVATIONS ; HELICAL JETS ; 8.4 GHZ ; BLAZARS ; EMISSION ; 3C-345 ; MOTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000241363700007
公开日期	2010-11-08
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/12305]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Cai, H. -B.,Shen, Z. -Q.,Chen, X.,et al. Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134[J]. ASTRONOMY & ASTROPHYSICS,2006,458(3):753-760.
APA	Cai, H. -B.,Shen, Z. -Q.,Chen, X.,&Shang, L. -L..(2006).Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134.ASTRONOMY & ASTROPHYSICS,458(3),753-760.
MLA	Cai, H. -B.,et al."Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134".ASTRONOMY & ASTROPHYSICS 458.3(2006):753-760.