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题名: The compact radio structure of radio-loud NLS1 galaxies and the relationship to CSS sources
作者: Gu, M.1, 2; Chen, Y.1, 3; Komossa, S.4; Yuan, W.5; Shen, Z.1, 3
刊名: ASTRONOMISCHE NACHRICHTEN
出版日期: 2016-02-01
卷号: 337, 期号:1-2, 页码:125-129
关键词: galaxies: active ; galaxies: jets ; galaxies: Seyfert ; radio continuum: galaxies
DOI: 10.1002/asna.201512277
文章类型: Article
英文摘要: Narrow-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
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: LINE SEYFERT 1 ; ACTIVE GALACTIC NUCLEI ; STEEP-SPECTRUM SOURCES ; GAMMA-RAY EMISSION ; 1ST-BASED SURVEY ; SCALE STRUCTURE ; BLACK-HOLES ; QUASARS ; JET ; POPULATION
收录类别: SCI
项目资助者: National Science Foundation of China(11473054 ; Science and Technology Commission of Shanghai Municipality(14ZR1447100 ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program on Space Science, the Chinese Academy of Sciences(XDA04060700) ; European Commission(283393) ; 11273042 ; 12ZR1436100) ; 11473035 ; 11173046 ; U1531245)
语种: 英语
WOS记录号: WOS:000370147600021
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16136
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.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
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