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The compact radio structure of radio-loud NLS1 galaxies and the relationship to CSS sources
Gu, M.1,2; Chen, Y.1,3; Komossa, S.4; Yuan, W.5; Shen, Z.1,3
2016-02-01
Source PublicationASTRONOMISCHE NACHRICHTEN
Volume337Issue:1-2Pages:125-129
AbstractNarrow-line Seyfert 1 galaxies are thought to be young AGNs with relatively small black hole masses and high accretion rates. Radio-loud narrow-line Seyfert 1 galaxies (RLNLS1s) are very special, because some of them show blazar-like characteristics, while others resemble compact steep-spectrum sources. Relativistic jets were shown to exist in a few RLNLS1s based on VLBI observations and confirmed by the gamma-ray flaring of some of them. These properties may possibly be contrary to typical radio-loud AGNs, in light of the low black-hole masses, and high accretion rates. We present the compact radio structure of fourteen RLNLS1 galaxies from Very Long Baseline Array observations at 5 GHz in 2013. Although all these sources are very radio-loud with R > 100, their jet properties are diverse, in terms of their milli-arcsecond (mas) scale (pc scale) morphology and their overall radio spectral shape. The core brightness temperatures of our sources are significantly lower than those of blazars, therefore, the beaming effect is generally not significant in our sources, compared to blazars. This implies that the bulk jet speed may likely be low in our sources. The relationship between RLNLS1s and compact steep-spectrum sources, and the implications on jet formation are discussed based on the pc-scale jet properties. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
KeywordGalaxies: Active Galaxies: Jets Galaxies: Seyfert Radio Continuum: Galaxies
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/asna.201512277
WOS KeywordLINE SEYFERT 1 ; ACTIVE GALACTIC NUCLEI ; STEEP-SPECTRUM SOURCES ; GAMMA-RAY EMISSION ; 1ST-BASED SURVEY ; SCALE STRUCTURE ; BLACK-HOLES ; QUASARS ; JET ; POPULATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000370147600021
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16136
Collection南极天文中心
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
5.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Gu, M.,Chen, Y.,Komossa, S.,et al. The compact radio structure of radio-loud NLS1 galaxies and the relationship to CSS sources[J]. ASTRONOMISCHE NACHRICHTEN,2016,337(1-2):125-129.
APA Gu, M.,Chen, Y.,Komossa, S.,Yuan, W.,&Shen, Z..(2016).The compact radio structure of radio-loud NLS1 galaxies and the relationship to CSS sources.ASTRONOMISCHE NACHRICHTEN,337(1-2),125-129.
MLA Gu, M.,et al."The compact radio structure of radio-loud NLS1 galaxies and the relationship to CSS sources".ASTRONOMISCHE NACHRICHTEN 337.1-2(2016):125-129.
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