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| The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI | |
Cao, Hong-Min1,2 ; Frey, Sandor3; Gabanyi, Krisztinae E.3,4; Yang, Jun5; Cui, Lang1; Hong, Xiao-Yu6; An, Tao6
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| 2019 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| ISSN | 0035-8711 |
| Volume | 482Issue:1Pages:L34-L39 |
| Contribution Rank | 1 |
| Abstract | 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. |
| Correspondent Email | hongmin.cao@foxmail.com (h.-m. c.); frey.sandor@csfk.mta.hu (s.f.) |
| Keyword | galaxies: active BL Lacertae objects: general galaxies: individual: J0644+6031 galaxies: individual: J1410+7405 quasars: general |
| DOI | 10.1093/mnrasl/sly184 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | VLA ; OBJECTS |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000482176700008 |
| Publisher | OXFORD UNIV PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/2968 |
| Collection | 射电天文研究室_星系宇宙学研究团组 科研仪器设备产出_利用南山26米射电望远镜（NSRT）观测数据的文章 |
| Corresponding Author | Cao, Hong-Min; Frey, Sandor |
| Affiliation | 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 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation 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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| Cao-2019-The loud an（459KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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