The core dominance parameter and Fermi detection of extragalactic radio sources
文献类型：期刊论文
| 作者 | Liu ZhenKuo1; Wu ZhongZu1; Gu MinFeng2 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2016 |
| 卷号 | 16期号:8页码:118 |
| 关键词 | LARGE-AREA TELESCOPE ACTIVE GALACTIC NUCLEI VLBI OBSERVATIONS RAY CONNECTION LOUD BLAZARS GALAXIES CATALOG SAMPLE BL Lacertae objects: general galaxies: active quasars: general galaxies: general gamma-rays: general |
| ISSN号 | 1674-4527 |
| 英文摘要 | By cross-correlating an archive sample of 542 extragalactic radio sources with the Fenni-LAT Third Source Catalog (3FGL), we have compiled a sample of 80 gamma-ray sources and 462 non-Fermi sources with available core dominance parameter (RcD), and core and extended radio luminosity; all the parameters are directly measured or derived from available data in the literature. We found that ROD has significant correlations with radio core luminosity, gamma-ray luminosity and gamma-ray flux; the Fermi sources have on average higher ROD than non-Fermi sources. These results indicate that the Fermi sources should be more compact, and the beaming effect should play a crucial role in the detection of gamma-ray emission. Moreover, our results also show Fermi sources have systematically larger radio flux than non-Fermi sources at fixed RcD, indicating larger intrinsic radio flux in Fermi sources. These results show a strong connection between radio and gamma-ray flux for the present sample and indicate that the non-Fermi sources are likely due to the low beaming effect, and/or the low intrinsic gamma-ray flux. This supports a scenario that has been published in the literature: a co-spatial origin of the activity for the radio and gamma-ray emission, suggesting that the origin of the seed photons for the high-energy gamma-ray emission is within the jet. |
| 资助项目 | [National Natural Science Foundation of China] ; [Science and Technology Commission of Shanghai Municipality] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63145]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.贵州大学 2.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Liu ZhenKuo,Wu ZhongZu,Gu MinFeng. The core dominance parameter and Fermi detection of extragalactic radio sources[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(8):118. |
| APA | Liu ZhenKuo,Wu ZhongZu,&Gu MinFeng.(2016).The core dominance parameter and Fermi detection of extragalactic radio sources.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(8),118. |
| MLA | Liu ZhenKuo,et al."The core dominance parameter and Fermi detection of extragalactic radio sources".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.8(2016):118. |
入库方式： OAI收割
来源：国家天文台
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