中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects

文献类型:期刊论文

作者Cheng, Xiaopeng2; An, Tao3,4; Wang, Ailing1,3; Jaiswal, Sumit3
刊名Galaxies
出版日期2023-03-01
卷号11页码:42
关键词galaxies active evolution radio continuum Astrophysics - High Energy Astrophysical Phenomena
ISSN号2075-4434
DOI10.3390/galaxies11020042
产权排序3
英文摘要Observational studies of GHz peaked spectrum (GPS) sources contribute to the understanding of the radiative properties and interstellar environment of host galaxies. We present the results from the multi-frequency high-resolution VLBI observations of a sample of nine GPS sources at 8, 15, and 43 GHz. All sources show core-jet structure. Four sources show relativistic jets with Doppler boosting factors ranging from 2.0 to 5.0 and a jet viewing angle between 10° and 30°. The core brightness temperatures of the other five sources are below the equipartition brightness temperature limit with their jet viewing angles in the range of 13.6° to 71.9°, which are systematically larger than those of relativistic jets in this sample. The sources show diverse variability properties, with variability levels ranging from 0.11 to 0.56. The measured turnover frequency in the radio spectrum ranges from 6.2 and 31.8 GHz (in the source's rest frame). We estimate the equipartition magnetic field strength to be between 9 and 48 mG. These results strongly support the notion that these GPS sources are young radio sources in the very early stage of their evolution.
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语种英语
源URL[http://ir.xao.ac.cn/handle/45760611-7/6639]  
专题研究单元未命名
作者单位1.University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China
2.Korea Astronomy and Space Science Institute, 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea;
3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Nandan Road 80, Shanghai 200030, China;
4.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China;
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GB/T 7714
Cheng, Xiaopeng,An, Tao,Wang, Ailing,et al. High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects[J]. Galaxies,2023,11:42.
APA Cheng, Xiaopeng,An, Tao,Wang, Ailing,&Jaiswal, Sumit.(2023).High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects.Galaxies,11,42.
MLA Cheng, Xiaopeng,et al."High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects".Galaxies 11(2023):42.

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