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IDV observations & study of the quasar 0917+624
Liu, Xiang1,2; Li, Quanwei1,3; Krichbaum, Thomas P.4; Aller, Margo F.5; Aller, Hugh D.5; Liu,X
2013-07-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume346Issue:1Pages:15-17
AbstractWe carried out intra-day variability (IDV) observations from August 2005 to January 2010 with the Urumqi 25 m radio telescope for a dozen IDV sources including the quasar 0917+624. This target exhibited pronounced centimeter-band, intra-day variability during the 1980s-1990s, but its strong IDV phase ceased in 2000. The source showed no IDV in the majority of the Urumqi observing sessions, although weak IDV activity was detected in some. Multifrequency UMRAO data for 0917+624 show that the spectral index is steeper during the weak and non-IDV phases than during the strong IDV phase, supporting the idea that the size of the scintillating component may be enlarged in the weak/non IDV phases.
KeywordQuasars: Individual: 0917+624 Radio Continuum: Galaxies Galaxies: Jets Ism: Structure Scattering
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10509-013-1446-x
WOS KeywordEXTRAGALACTIC RADIO-SOURCES ; SCINTILLATION-INDUCED VARIABILITY ; INTRADAY VARIABILITY ; INTERSTELLAR SCINTILLATION ; ANNUAL MODULATION ; COMPACT
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000320042700003
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10111
Collection期刊(老文献)
Corresponding AuthorLiu,X
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Max Planck Inst Radioastron, D-53121 Bonn, Germany
5.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
Recommended Citation
GB/T 7714
Liu, Xiang,Li, Quanwei,Krichbaum, Thomas P.,et al. IDV observations & study of the quasar 0917+624[J]. ASTROPHYSICS AND SPACE SCIENCE,2013,346(1):15-17.
APA Liu, Xiang,Li, Quanwei,Krichbaum, Thomas P.,Aller, Margo F.,Aller, Hugh D.,&Liu,X.(2013).IDV observations & study of the quasar 0917+624.ASTROPHYSICS AND SPACE SCIENCE,346(1),15-17.
MLA Liu, Xiang,et al."IDV observations & study of the quasar 0917+624".ASTROPHYSICS AND SPACE SCIENCE 346.1(2013):15-17.
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