J0906+6930: a radio-loud quasar in the early Universe

doi:10.1093/mnras/stx392

	J0906+6930: a radio-loud quasar in the early Universe
	Zhang, Yingkang 1,2; An, Tao 1,3; Frey, Sandor 1,4; Gabanyi, Krisztina E.4; Paragi, Zsolt 5; Gurvits, Leonid I.5,6; Sohn, Bong Won 7; Jung, Taehyun 7; Kino, Motoki 7,8; Lao, Baoqiang 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-06-01
卷号	468 期号:1 页码:69-76
关键词	techniques: interferometric galaxies: high-redshift quasars: individual: J0131-0321 quasars: individual: J0906+6930 quasars: individual: J1026+2542 radio continuum: galaxies.
ISSN号	0035-8711
DOI	10.1093/mnras/stx392
通讯作者	An, Tao(antao@shao.ac.cn)
英文摘要	Radio-loud high-redshift quasars (HRQs), although only a few of them are known to date, are crucial for studies of the growth of supermassive black holes (SMBHs) and the evolution of active galactic nuclei at early cosmological epochs. Radio jets offer direct evidence of SMBHs, and their radio structures can be studied with the highest angular resolution using very long baseline interferometry (VLBI). Here we report on the observations of three HRQs (J0131-0321, J0906+ 6930 and J1026+ 2542) at z > 5 using the Korean VLBI Network and VLBI Exploration of Radio Astrometry Arrays (together known as KaVA) with the purpose of studying their pc-scale jet properties. The observations were carried out at 22 and 43 GHz in 2016 January among the first-batch open-use experiments of KaVA. The quasar J0906+ 6930 was detected at 22 GHz but not at 43 GHz. The other two sources were not detected and upper limits to their compact radio emission are given. Archival VLBI imaging data and the singledish 15-GHz monitoring light curve of J0906+ 6930 were also acquired as complementary information. J0906+ 6930 shows a moderate-level variability at 15 GHz. The radio image is characterized by a core-jet structure with a total detectable size of -5 pc in projection. The brightness temperature, >= 1.9 x 1011 K, indicates relativistic beaming of the jet. The radio properties of J0906+ 6930 are consistent with a blazar. Follow-up VLBI observations will be helpful for determining its structural variation.
WOS关键词	KOREAN VLBI NETWORK ; DIGITAL SKY SURVEY ; HIGH-FREQUENCY PEAKERS ; MASSIVE BLACK-HOLES ; AGN JETS ; SDSS J013127.34-032100.1 ; BRIGHTNESS TEMPERATURE ; DISTANT BLAZAR ; EARLY SCIENCE ; HIGH-REDSHIFT
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000398419200004
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/23171]
专题	中国科学院紫金山天文台
通讯作者	An, Tao
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 4.MTA Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary 5.Joint Inst VLBI ERIC, Postbus 2, NL-7990 AA Dwingeloo, Netherlands 6.Delft Univ Technol, Dept Astrodynam & Space Missions, Kluyverweg 1, NL-2629 HS Delft, Netherlands 7.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 305348, South Korea 8.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
推荐引用方式 GB/T 7714	Zhang, Yingkang,An, Tao,Frey, Sandor,et al. J0906+6930: a radio-loud quasar in the early Universe[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(1):69-76.
APA	Zhang, Yingkang.,An, Tao.,Frey, Sandor.,Gabanyi, Krisztina E..,Paragi, Zsolt.,...&Mohan, Prashanth.(2017).J0906+6930: a radio-loud quasar in the early Universe.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(1),69-76.
MLA	Zhang, Yingkang,et al."J0906+6930: a radio-loud quasar in the early Universe".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.1(2017):69-76.