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THE GAMMA-RAY-EMITTING QUASAR 0202+149: A CSS REVISITED
An, T.1,2,3; Cui, Y. -Z.1,2; Baan, W. A.1,4; Wang, W. -H.1,3; Mohan, P.1
2016-08-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume826Issue:2
AbstractPKS 0202+149 is a low-power radio source with blazar-like, gamma-ray active galactic nucleus (AGN) characteristics. We investigate its properties and classification in relation to its gamma-ray characteristics. This source shows a hint of low-frequency turnover at about 200 MHz. Radio imaging data of 0202+149 at different frequencies show differing morphologies on both kiloparsec (kpc) and parsec (pc) scales. The overall source shows a triple structure of a core and double lobes with a total projected size of similar to 1.3 kpc. The compact source structure of 0202+149 is reminiscent of a compact steep spectrum (CSS) source. At pc scales, a core-jet structure extends similar to 25 pc (in projection) at a position angle perpendicular to the kpc-scale structure. The curved pc-scale structure with a jet and inner lobe suggests that the CSS nuclear activity has recently re-started, although its power has been decreasing, while the kpc-scale lobes are relics of earlier activity. A maximum apparent superluminal motion of similar to 16 c is detected in the jet components, indicating a highly relativistic jet flow. The brightness temperature of the core is lower than the average value found for highly beamed, gamma-ray AGNs, indicating a lower radio power and a relatively lower Doppler boosting factor. The CSS radio classification indicates that blazar-like gamma-ray properties can also be manifested in low-power CSS radio sources with the appropriate jet and beaming properties.
KeywordGalaxies: Active Quasars: Individual (Pks 0202+149) Radio Continuum: Galaxies
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/826/2/190
WOS KeywordACTIVE GALACTIC NUCLEI ; LARGE-AREA TELESCOPE ; FREQUENCY VARIABLE SOURCES ; SPECTRUM RADIO-SOURCES ; CORE-DOMINANCE PARAMETER ; EPOCH VLBI OBSERVATIONS ; SUPERLUMINAL MOTION ; RELATIVISTIC JETS ; SCALE STRUCTURE ; SOURCE CATALOG
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000381977900090
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23614
Collection中国科学院紫金山天文台
Corresponding AuthorAn, T.
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Shanghai Inst Technol, Sch Elect & Elect Engn, Shanghai 201418, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
4.Netherlands Inst Radio Astron ASTRON, POB 2, NL-7990 AA Dwingeloo, Netherlands
Recommended Citation
GB/T 7714
An, T.,Cui, Y. -Z.,Baan, W. A.,et al. THE GAMMA-RAY-EMITTING QUASAR 0202+149: A CSS REVISITED[J]. ASTROPHYSICAL JOURNAL,2016,826(2).
APA An, T.,Cui, Y. -Z.,Baan, W. A.,Wang, W. -H.,&Mohan, P..(2016).THE GAMMA-RAY-EMITTING QUASAR 0202+149: A CSS REVISITED.ASTROPHYSICAL JOURNAL,826(2).
MLA An, T.,et al."THE GAMMA-RAY-EMITTING QUASAR 0202+149: A CSS REVISITED".ASTROPHYSICAL JOURNAL 826.2(2016).
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