KMS National Astronomical Observatories, CAS
| Jet Properties of Compact Steep-spectrum Sources and an Eddington-ratio-driven Unification Scheme of Jet Radiation in Active Galactic Nuclei | |
Zhang,Jin1 ; Zhang,Hai-Ming2; Gan,Ying-Ying3; Yi,Ting-Feng4; Wang,Jun-Feng5; Liang,En-Wei3
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| 2020-08-01 | |
| Source Publication | The Astrophysical Journal
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| ISSN | 0004-637X |
| Volume | 899Issue:1 |
| Abstract | Abstract Compact steep-spectrum sources (CSSs) likely represent a population of young radio-loud active galactic nuclei (AGNs) and have been identified as γ-ray-emitting sources. We present a comprehensive analysis of their γ-ray emission observed with Fermi/LAT and establish their broadband spectral energy distributions (SEDs). We derive their jet properties using SED fits with a two-zone leptonic model for radiation from the compact core and the large-scale extended region, and explore the possible signature of a unification picture of jet radiation among subclasses of AGNs. We show that the observed γ-rays of CSSs with significant variability are contributed by the radiation of their compact cores via the inverse-Compton process of the torus photons. The derived power-law distribution index of the radiating electrons is p1?～?1.5–1.8, magnetic field strength is B?～?0.15–0.6 G, and Doppler-boosting factor is δ?～?2.8–8.9. Assuming that the jet is composed of e± pairs, the compact cores of CSSs are magnetized and have a high radiation efficiency, similar to that of flat-spectrum radio quasars. The γ-ray-emitting CSSs on average have higher Eddington ratio and black hole mass than those non-GeV-detected CSSs, and they follow the correlation between the jet power in units of Eddington luminosity ( ) and Eddington ratio (REdd) with other subclasses of AGNs, , indicating that REdd would be a key physical driver for the unification scheme of AGN jet radiation. |
| Keyword | Active galactic nuclei Relativistic jets Compact galaxies Gamma-rays Non-thermal radiation sources |
| DOI | 10.3847/1538-4357/aba2cd |
| Language | 英语 |
| WOS ID | IOP:0004-637X-899-1-aba2cd |
| Publisher | The American Astronomical Society |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/61708 |
| Collection | 中国科学院国家天文台 |
| Affiliation | 1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China; jinzhang@bao.ac.cn 2.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People’s Republic of China 3.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People’s Republic of China; lew@gxu.edu.cn 4.Department of Physics, Yunnan Normal University, Kunming 650500, People’s Republic of China 5.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China; jfwang@xmu.edu.cn |
| First Author Affilication | National Astronomical Observatories, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Zhang,Jin,Zhang,Hai-Ming,Gan,Ying-Ying,et al. Jet Properties of Compact Steep-spectrum Sources and an Eddington-ratio-driven Unification Scheme of Jet Radiation in Active Galactic Nuclei[J]. The Astrophysical Journal,2020,899(1). |
| APA | Zhang,Jin,Zhang,Hai-Ming,Gan,Ying-Ying,Yi,Ting-Feng,Wang,Jun-Feng,&Liang,En-Wei.(2020).Jet Properties of Compact Steep-spectrum Sources and an Eddington-ratio-driven Unification Scheme of Jet Radiation in Active Galactic Nuclei.The Astrophysical Journal,899(1). |
| MLA | Zhang,Jin,et al."Jet Properties of Compact Steep-spectrum Sources and an Eddington-ratio-driven Unification Scheme of Jet Radiation in Active Galactic Nuclei".The Astrophysical Journal 899.1(2020). |
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