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VLBI observations of the puzzling BL lacertae object 0235+164
Chu, HS; Baath, LB; Rantakyro, FT; Zhang, FJ; Nicholson, G
1996-03-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume307Issue:1Pages:15-20
AbstractFor 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.
KeywordBl Lacertae Objects, Ao 0235+164 Galaxies, Jets Radio Continuum, Galaxies
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordACTIVE GALACTIC NUCLEI ; AO-0235+164 ; VARIABILITY ; JETS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:A1996TZ45200009
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8461
Collection期刊(老文献)
Affiliation1.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
Recommended Citation
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.
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