THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES

	THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES
	An, Tao 1,2,3; Baan, Willem A.2
刊名	ASTROPHYSICAL JOURNAL
	2012-11-20
卷号	760 期号:1
关键词	galaxies: active galaxies: evolution galaxies: jets
ISSN号	0004-637X
通讯作者	An,T
英文摘要	The evolution of symmetric extragalactic radio sources can be characterized by four distinct growth stages of the radio luminosity versus size of the source. The interaction of the jet with the ambient medium results in the formation and evolution of sources with non-standard (flaring) morphology. In addition, cessation or restarting of the jet power and obstruction of the jet will also result in distinct morphological structures. The radio source population may thus be classified in morphological types that indicate the prevailing physical processes. Compact symmetric objects (CSOs) occupy the earliest evolutionary phase of symmetric radio sources and their dynamical behavior is fundamental for any further evolution. Analysis of CSO dynamics is presented for a sample of 24 CSOs with known redshift and hotspot separation velocity and with a large range of radio power. Observables such as radio power, separation between two hotspots, hotspot separation velocity, and kinematic age of the source are found to be generally consistent with the self-similar predictions for individual sources that reflect the varying density structure of the ambient interstellar medium. Individual sources behave different from the group as a whole. The age and size statistics confirm that a large fraction of CSOs does not evolve into extended doubles.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	COMPACT STEEP-SPECTRUM ; ACTIVE GALACTIC NUCLEI ; HIGH-FREQUENCY PEAKERS ; MULTIFREQUENCY VLA OBSERVATIONS ; PARSEC-SCALE MORPHOLOGY ; B3-VLA CSS SAMPLE ; SYMMETRIC OBJECTS ; VLBI OBSERVATIONS ; 18 CM ; POLARIZATION OBSERVATIONS
收录类别	SCI
语种	英语
WOS记录号	WOS:000310922200077
公开日期	2014-05-15
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/10099]
专题	紫金山天文台_期刊（老文献）
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.ASTRON, NL-7990 AA Dwingeloo, Netherlands 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	An, Tao,Baan, Willem A.. THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES[J]. ASTROPHYSICAL JOURNAL,2012,760(1).
APA	An, Tao,&Baan, Willem A..(2012).THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES.ASTROPHYSICAL JOURNAL,760(1).
MLA	An, Tao,et al."THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES".ASTROPHYSICAL JOURNAL 760.1(2012).