Radio morphology of southern narrow-line Seyfert 1 galaxies with Very Large Array observations

被引：18

作者：

Chen, S. ^{[1
]}

Jarvela, E. ^{[2
]}

Crepaldi, L. ^{[3
]}

Zhou, M. ^{[4
,5
]}

Ciroi, S. ^{[3
,6
]}

Berton, M. ^{[7
,8
]}

Kharb, P. ^{[9
]}

Foschini, L. ^{[10
]}

Gu, M. ^{[4
]}

La Mura, G. ^{[11
]}

Vietri, A. ^{[3
]}

机构：

[1] Technion, Phys Dept, IL-32000 Haifa, Israel

[2] European Space Agcy, European Space Astron Ctr, C Bajo El Castillo S-N, E-28692 Madrid, Spain

[3] Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy

[4] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China

[5] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

[6] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[7] Univ Turku, Finnish Ctr Astron ESO FINCA, Vesilinnantie 5, FI-20014 Turku, Finland

[8] Aalto Univ, Metsahovi Radio Observ, Metsahovintie 114, FI-02540 Kylmala, Finland

[9] Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Post Bag 3, Pune 411007, Maharashtra, India

[10] INAF Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, LC, Italy

[11] LIP Lab Instrumentat & Expt Particle Phys, Av Prof Gama Pinto 2, P-1649003 Lisbon, Portugal

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 498卷 / 01期

基金：

美国国家航空航天局;

关键词：

galaxies: active; galaxies: jets; galaxies: nuclei; galaxies: Seyfert; radio continuum: galaxies; ACTIVE GALACTIC NUCLEI; X-RAY-PROPERTIES; CENTRAL ENGINES; PMN J0948+0022; HOST GALAXIES; JET POWER; EMISSION; LOUD; VARIABILITY; ACCRETION;

D O I：

10.1093/mnras/staa2373

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of new radio observations carried out with the Karl G. Jansky Very Large Array C-configuration at 5.5 GHz for a sample of southern narrow-line Seyfert 1 galaxies (NLS1s). This work increases the number of known radio-detected NLS1s in the Southern hemisphere, and confirms that the radio emission of NLS1s is mainly concentrated in a central region at kpc-scale and only a few sources show diffuse emission. In radio-quiet NLS1s, the radio luminosity tends to be higher in steep-spectrum sources and be lower in flat-spectrum sources, which is opposite to radio-loud NLS1s. This may be because the radio emission of steep NLS1s is dominated by misaligned jets, active galactic nucleus driven outflows, or star formation superposing on a compact core. Instead the radio emission of flat NLS1s may be produced by a central core that has not yet developed radio jets and outflows. We discover new NLS1s harbouring kpc-scale radio jets and confirm that a powerful jet does not require a large-mass black hole to be generated. We also find sources dominated by star formation. These NLS1s could be new candidates in investigating the radio emission of different mechanisms.

引用

页码：1278 / 1297

页数：20

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