The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI
文献类型：期刊论文
| 作者 | Cao, Hong-Min1,2 ; Frey, Sandor3; Gabanyi, Krisztinae E.3,4; Yang, Jun5; Cui, Lang1; Hong, Xiao-Yu6; An, Tao6
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2019 |
| 卷号 | 482期号:1页码:L34-L39 |
| 关键词 | galaxies: active BL Lacertae objects: general galaxies: individual: J0644+6031 galaxies: individual: J1410+7405 quasars: general |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnrasl/sly184 |
| 产权排序 | 1 |
| 英文摘要 | BL Lac objects are known to have compact jets inclined to our line of sight at a small angle, showing prominent radio emission. Two radio-weak BL Lac candidates with no counterparts in current radio surveys were recently reported by Massaro et al. Both sources were selected as candidate low-energy counterparts of unassociated Fermi gamma-ray sources. We carried out very long baseline interferometry (VLBI) observations with the European VLBI Network (EVN) at 5 GHz to explore their radio properties at the milliarcsecond (mas) scale. One target, J1410+7405, is clearly detected with the EVN. Its measured 5-GHz flux density, 2.4 mJy, is consistent with recent interferometric measurements with the Karl G. Jansky Very Large Array, suggesting that the radio emission is confined to the inner less than or similar to 10-mas region. J1410+7405 is therefore identified as a radio-loud jetted active galactic nucleus, and its brightness temperature exceeds similar to 10(9) K. Its properties are similar to those of other gamma-ray-detected BL Lac objects. On the other hand, the second target, J0644+6031, remains undetected with the EVN with a 6 sigma brightness upper limit of 0.12 mJy beam(-1). This source is thus radio-quiet, confirming its peculiarity, or possibly questioning its BL Lac nature. |
| WOS关键词 | VLA ; OBJECTS |
| 资助项目 | Hungarian National Research, Development and Innovation Office[OTKA NN110333] ; National Natural Science Foundation of China[11503072] ; EVN[EC061] ; CAS 'Light of West China' programme[2016-QNXZ-B-21] ; CAS 'Light of West China' programme[YBXM-2014-02] ; National Natural Science Foundation of China[U1731103] ; National Natural Science Foundation of China[11573016] ; Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000482176700008 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/2967]  |
| 专题 | 星系宇宙学研究团组 射电天文研究室_利用南山26米射电望远镜观测数据的文章 |
| 通讯作者 | Cao, Hong-Min; Frey, Sandor |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Shangqiu Normal Univ, Sch Elect & Elect Engn, Wenhua Rd 298, Shangqiu 476000, Henan, Peoples R China 3.MTA Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary 4.MTA ELTE Extragalact Astrophys Res Grp, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary 5.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, SE-43992 Onsala, Sweden 6.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Radio Astron, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Hong-Min,Frey, Sandor,Gabanyi, Krisztinae E.,et al. The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,482(1):L34-L39. |
| APA | Cao, Hong-Min.,Frey, Sandor.,Gabanyi, Krisztinae E..,Yang, Jun.,Cui, Lang.,...&An, Tao.(2019).The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,482(1),L34-L39. |
| MLA | Cao, Hong-Min,et al."The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482.1(2019):L34-L39. |
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