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THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES
An, Tao1,2,3; Baan, Willem A.2; An,T
2012-11-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume760Issue:1
AbstractThe 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.
KeywordGalaxies: Active Galaxies: Evolution Galaxies: Jets
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/760/1/77
WOS KeywordCOMPACT 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
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000310922200077
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10099
Collection期刊(老文献)
Corresponding AuthorAn,T
Affiliation1.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
Recommended Citation
GB/T 7714
An, Tao,Baan, Willem A.,An,T. THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES[J]. ASTROPHYSICAL JOURNAL,2012,760(1).
APA An, Tao,Baan, Willem A.,&An,T.(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).
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