IDV observations & study of the quasar 0917+624

	IDV observations & study of the quasar 0917+624
	Liu, Xiang 1,2; Li, Quanwei 1,3; Krichbaum, Thomas P.4; Aller, Margo F.5; Aller, Hugh D.5
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2013-07-01
卷号	346 期号:1 页码:15-17
关键词	Quasars: individual: 0917+624 Radio continuum: galaxies Galaxies: jets ISM: structure Scattering
ISSN号	0004-640X
通讯作者	Liu,X
英文摘要	We 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.
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]	EXTRAGALACTIC RADIO-SOURCES ; SCINTILLATION-INDUCED VARIABILITY ; INTRADAY VARIABILITY ; INTERSTELLAR SCINTILLATION ; ANNUAL MODULATION ; COMPACT
收录类别	SCI
语种	英语
WOS记录号	WOS:000320042700003
公开日期	2014-05-22
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/10111]
专题	紫金山天文台_期刊（老文献）
作者单位	1.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
推荐引用方式 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..(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.