KMS of Xinjiang Astronomical Observatory, CAS
| High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects | |
| Cheng, Xiaopeng1; An, Tao2,3; Wang, Ailing2,4; Jaiswal, Sumit2 | |
| 2023-03-01 | |
| Source Publication | Galaxies
 |
| ISSN | 2075-4434 |
| Volume | 11Pages:42 |
| Contribution Rank | 3 |
| Abstract | 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. |
| Keyword | galaxies active evolution radio continuum Astrophysics - High Energy Astrophysical Phenomena |
| DOI | 10.3390/galaxies11020042 |
| URL | 查看原文 |
| Indexed By | 其他 |
| Language | 英语 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6639 |
| Collection | 中国科学院新疆天文台 |
| Affiliation | 1.Korea Astronomy and Space Science Institute, 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; 2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Nandan Road 80, Shanghai 200030, China; 3.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China; 4.University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, China |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Cheng-2023-High-Freq（1787KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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