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Rapid variability of BL Lac 0925+504: interstellar scintillation induced?
Liu, Jun1; Liu, Xiang1,2
2015-06-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
Volume357Issue:2
AbstractAnalysis of rapid variability at 4.85 GHz for the BL Lac object 0925+504 is presented and discussed. The structure functions (SF) are investigated with both refractive and weak interstellar scintillation (RISS/WISS) models analytically. Parameters obtained with these models are quantitatively compared, suggesting that the emission region of IDV is remarkably compact and the responsible interstellar scintillation medium (ISM) lies very close to the observer. Furthermore possible evidence of annual modulation of the variability timescales is detected in this source. Our findings indicate that the observed rapid variability in 0925+504 is predominantly caused by a scattering screen located along the line of sight to the source, at a distance of similar to 110 pc to the observer.
KeywordGalaxies: Active Bl Lacertae Objects: Individual: 0925+504 Ism: Structure Methods: Data Analysis
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10509-015-2393-5
WOS KeywordEXTRAGALACTIC RADIO-SOURCES ; INTRADAY VARIABILITY ; PULSAR SCINTILLATION ; LACERTAE OBJECTS ; FERMI ; TELESCOPE ; BLAZARS ; SAMPLE ; VLBI ; 1ST
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000357338700012
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16000
Collection暗物质和空间天文实验室
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jun,Liu, Xiang. Rapid variability of BL Lac 0925+504: interstellar scintillation induced?[J]. ASTROPHYSICS AND SPACE SCIENCE,2015,357(2).
APA Liu, Jun,&Liu, Xiang.(2015).Rapid variability of BL Lac 0925+504: interstellar scintillation induced?.ASTROPHYSICS AND SPACE SCIENCE,357(2).
MLA Liu, Jun,et al."Rapid variability of BL Lac 0925+504: interstellar scintillation induced?".ASTROPHYSICS AND SPACE SCIENCE 357.2(2015).
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