SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images

doi:10.1093/mnrasl/sly174

	SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images
	Shu, Yiping 1,2; Marques-Chaves, Rui 3,4; Evans, N. Wyn 2; Perez-Fournon, Ismael 3,4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018-11-01
卷号	481 期号:1 页码:L136-L140
关键词	gravitational lensing: strong quasars: individual: SDSS J0909+4449
ISSN号	0035-8711
DOI	10.1093/mnrasl/sly174
通讯作者	Shu, Yiping(yiping.shu@pmo.ac.cn)
英文摘要	We report the discovery of SDSS J0909+4449, an exceptional system consisting of a quasar at z = 2.788 strongly lensed by a group of galaxies at z similar to 0.9 into three images separated by up to 14 arcsec based on archival data collected by the Sloan Digital Sky Survey, extended Baryon Oscillation Spectroscopic Survey, Beijing-Arizona Sky Survey, the Mayall z-band Legacy Survey, and the Gemini Telescope. We discuss two hypotheses on the nature of SDSS J0909+4449, i.e. a rare triply imaged quasar in the naked cusp configuration and a typical quadruply imaged quasar with the fourth image undetected in this data. We find that simple lens models can provide excellent fits to the observed image positions and the non-detection under either hypothesis. Deeper imaging data, spectroscopic observations, and follow-up light-curve measurements will be helpful in determining which hypothesis is correct and provide better constraints on the lens mass distribution. Nevertheless, given its unusually large image separations, SDSS J0909+4449 will be a unique probe for the mass structure and the underlying cooling and stellar feedback processes on group or cluster scales.
WOS关键词	GRAVITATIONAL LENSING LIMITS ; DARK-MATTER ; EMISSION ; STELLAR ; MODELS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000451569100028
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/20731]
专题	中国科学院紫金山天文台
通讯作者	Shu, Yiping
作者单位	1.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 3.Inst Astrofis Canarias, C Via Lactea S-N, E-38205 Tenerife, Spain 4.Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain
推荐引用方式 GB/T 7714	Shu, Yiping,Marques-Chaves, Rui,Evans, N. Wyn,et al. SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,481(1):L136-L140.
APA	Shu, Yiping,Marques-Chaves, Rui,Evans, N. Wyn,&Perez-Fournon, Ismael.(2018).SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,481(1),L136-L140.
MLA	Shu, Yiping,et al."SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 481.1(2018):L136-L140.