Parsec-scale jet properties of the gamma-ray quasar 3C 286

doi:10.1093/mnras/stw2887

	Parsec-scale jet properties of the gamma-ray quasar 3C 286
	An, T.1,2; Lao, B. -Q.1; Zhao, W.1; Mohan, P.1; Cheng, X. -P.1,3; Cui, Y. -Z.1; Zhang, Z. -L.1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-04-01
卷号	466 期号:1 页码:952-959
关键词	techniques: interferometric quasars: individual: 3C 286 radio continuum:galaxies
ISSN号	0035-8711
DOI	10.1093/mnras/stw2887
通讯作者	An, T.(antao@shao.ac.cn)
英文摘要	The quasar 3C 286 is one of two compact steep-spectrum sources detected by the Fermi/Large Area Telescope. Here, we investigate the radio properties of the parsec(pc)-scale jet and its (possible) association with the gamma-ray emission in 3C 286. The Very Long Baseline Interferometry (VLBI) images at various frequencies reveal a one-sided core-jet structure extending to the south-west at a projected distance of similar to 1 kpc. The component at the jet base showing an inverted spectrum is identified as the core, with a mean brightness temperature of 2.8 x 10(9) K. The jet bends at about 600 pc (in projection) away from the core, from a position angle of -135 degrees to -115 degrees. Based on the available VLBI data, we inferred the proper-motion speed of the inner jet as 0.013 +/- 0.011 mas yr(-1) (beta(app) = 0.6 +/- 0.5), corresponding to a jet speed of about 0.5 c at an inclination angle of 48. between the jet and the line of sight of the observer. The brightness temperature, jet speed and Lorentz factor are much lower than those of gamma-ray-emitting blazars, implying that the pc-scale jet in 3C 286 is mildly relativistic. Unlike blazars in which gamma-ray emission is in general thought to originate from the beamed innermost jet, the location and mechanism of gamma-ray emission in 3C 286 may be different as indicated by the current radio data. Multiband spectrum fitting may offer a complementary diagnostic clue of the gamma-ray production mechanism in this source.
WOS关键词	ACTIVE GALACTIC NUCLEI ; LARGE-AREA TELESCOPE ; STEEP-SPECTRUM SOURCES ; PROBE WMAP OBSERVATIONS ; EXTRAGALACTIC RADIO-SOURCES ; VLBA CALIBRATOR SURVEY ; HIGH-ENERGY EMISSION ; BL LACERTAE OBJECTS ; SOURCE CATALOG ; 5 GHZ
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000398112400065
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/23165]
专题	中国科学院紫金山天文台
通讯作者	An, T.
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	An, T.,Lao, B. -Q.,Zhao, W.,et al. Parsec-scale jet properties of the gamma-ray quasar 3C 286[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,466(1):952-959.
APA	An, T..,Lao, B. -Q..,Zhao, W..,Mohan, P..,Cheng, X. -P..,...&Zhang, Z. -L..(2017).Parsec-scale jet properties of the gamma-ray quasar 3C 286.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,466(1),952-959.
MLA	An, T.,et al."Parsec-scale jet properties of the gamma-ray quasar 3C 286".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 466.1(2017):952-959.