VLBI observations of the puzzling BL lacertae object 0235+164

	VLBI observations of the puzzling BL lacertae object 0235+164
	Chu, HS ; Baath, LB ; Rantakyro, FT ; Zhang, FJ ; Nicholson, G
刊名	ASTRONOMY & ASTROPHYSICS
	1996-03-01
卷号	307 期号:1 页码:15-20
关键词	BL Lacertae objects, AO 0235+164 galaxies, jets radio continuum, galaxies
ISSN号	0004-6361
英文摘要	For over 20 years, many models have been proposed to explain the variability of AO 0235+164. Among them, the most favorable has been micro-lensing. We have made a series of VLBI observations on this source in order to better understand its nature. The resultant maps indicate dramatic changes in the position angle of the jet between observations as well as a correlation between the intensity of the VLBI core and flux outbursts which occurred between the observing sessions. These characteristics, in conjunction with other arguments, suggest that the source variability is intrinsic, i.e. microlensing is of minor importance. We suggest two models: 1) a model in which the jet starts at a very small angle to the line of sight and then curves away to become about 6 degrees at about 1 mas from the core; and 2) a CME (Coronal Mass Ejection) model that also may explain the violent variability in intensity, polarization position angle, and jet direction in AO 0235+164.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; AO-0235+164 ; VARIABILITY ; JETS
收录类别	SCI
语种	英语
WOS记录号	WOS:A1996TZ45200009
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8461]
专题	紫金山天文台_期刊（老文献）
作者单位	1.UNIV HALMSTAD, CTR IMAGING TECHNOL, S-30118 HALMSTAD, SWEDEN 2.ACAD SINICA, SHANGHAI OBSERV, SHANGHAI 200030, PEOPLES R CHINA 3.NATL INST TELECOMMUN RES, JOHANNESBURG, SOUTH AFRICA 4.ACAD SINICA, PURPLE MT OBSERV, NANJING 210008, PEOPLES R CHINA
推荐引用方式 GB/T 7714	Chu, HS,Baath, LB,Rantakyro, FT,et al. VLBI observations of the puzzling BL lacertae object 0235+164[J]. ASTRONOMY & ASTROPHYSICS,1996,307(1):15-20.
APA	Chu, HS,Baath, LB,Rantakyro, FT,Zhang, FJ,&Nicholson, G.(1996).VLBI observations of the puzzling BL lacertae object 0235+164.ASTRONOMY & ASTROPHYSICS,307(1),15-20.
MLA	Chu, HS,et al."VLBI observations of the puzzling BL lacertae object 0235+164".ASTRONOMY & ASTROPHYSICS 307.1(1996):15-20.