VLBI observations of a sample of Palomar-Green quasars - I. Parsec-scale morphology
文献类型：期刊论文
| 作者 | Wang, Ailing8,9; An, Tao8,9; Cheng, Xiaopeng7; Ho, Luis C.5,6; Kellermann, Kenneth, I4; Baan, Willem A.2,3; Yang, Jun1 ; Zhang, Yingkang9
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2022-11-12 |
| 卷号 | 518期号:1页码:39-53 |
| 关键词 | instrumentation: high angular resolution methods: observational galaxies: jets galaxies: nuclei |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stac3091 |
| 通讯作者 | Wang, Ailing(wal@shao.ac.cn) ; An, Tao(antao@shao.ac.cn) |
| 英文摘要 | We observed 20 Palomar-Green quasars at low redshi ft (z < 0.5) with total flux density >1 mJy, including four radio-loud quasars (RLQs) and 16 radio-quiet quasars (RQQs), using the Very Long Baseline Array (VLBA) at 5 GHz. 10 RQQs are clearly detected in the VLBA images, and a compact radio core is identified in eight of them, indicating the prevalence of active galactic nucleus (AGN)-related radio emission in this flux-density-limited RQQ sample. The RQQs and RLQs in our sample have a division at similar to 30 mJy. The radio emission from RQQs appears to be the result of a combination of star formation and AGN-associated activities. All RQQs in our sample have a 5 GHz flux density ratio of Very Large Array (VLA) A-array to D-array f(c) = S-A(VLA)/S-D(VLA) above 0.2. The RQQs with f(a)(VLBA and VLA flux density ratio S-VLBA/S-A(VLA)) > 0.2 versus f(a) < 0.2 show significant differences in morphology, compactness, and total flux density. f(a) of RQQs is systematically lower than that of RLQs, probably due to the extended jets or relic jets of RQQs on tens to hundreds parsecs that are resolved out in VLBA images. Future larger samples, especially with the addition of milliarcsec resolution radio images of RQQs with total flux densities below 1 mJy, can test the conclusions of this paper and contribute to the understanding of the radio emission mechanism of RQQs, and the dichotomy and physical connection between RQQs and RLQs. |
| WOS关键词 | RADIO-QUIET QUASARS ; SEYFERT 1 GALAXY ; CENTRAL ENGINES ; HOST GALAXIES ; MOLECULAR GAS ; EMISSION ; JET ; VARIABILITY ; LOUD ; SPECTRA |
| 资助项目 | National Key R&D Program of China[2018YFA0404603] ; National Key R&D Program of China[2022SKA0120102] ; Brain Pool Programme through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT[2019H1D3A1A01102564] ; National Science Foundation of China[11721303] ; National Science Foundation of China[11991052] ; National Science Foundation of China[12011540375] ; China Manned Space Project[CMS-CSST-2021-A04] ; China Manned Space Project[CMS-CSST-2021-A06] ; National Natural Science Foundation of China[11433008] ; Chinese Academy of Sciences President's International Fellowship Initiative[2021VMA0008] ; Chinese Academy of Sciences President's International Fellowship Initiative[2022VMA0019] ; Shanghai Astronomical Observatory through an MoU with the NRAO[BA114] ; Ministry of Science and Technology of China ; Chinese Academy of Sciences |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000882473800004 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Key R&D Program of China ; Brain Pool Programme through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; National Science Foundation of China ; China Manned Space Project ; National Natural Science Foundation of China ; Chinese Academy of Sciences President's International Fellowship Initiative ; Shanghai Astronomical Observatory through an MoU with the NRAO ; Ministry of Science and Technology of China ; Chinese Academy of Sciences |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4960]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Wang, Ailing; An, Tao |
| 作者单位 | 1.Onsala Space Observ, Chalmers Univ Technol, Dept Space Earth & Environm, SE-43992 Onsala, Sweden 2.Netherlands Inst Radio Astron ASTRON, NL-7991 PD Dwingeloo, Netherlands 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China 4.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 5.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 7.Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea 8.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 9.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Ailing,An, Tao,Cheng, Xiaopeng,et al. VLBI observations of a sample of Palomar-Green quasars - I. Parsec-scale morphology[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,518(1):39-53. |
| APA | Wang, Ailing.,An, Tao.,Cheng, Xiaopeng.,Ho, Luis C..,Kellermann, Kenneth, I.,...&Zhang, Yingkang.(2022).VLBI observations of a sample of Palomar-Green quasars - I. Parsec-scale morphology.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,518(1),39-53. |
| MLA | Wang, Ailing,et al."VLBI observations of a sample of Palomar-Green quasars - I. Parsec-scale morphology".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 518.1(2022):39-53. |
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