Quasar Lensing Caused by Clusters of Galaxies in Various Cosmological Models

Publications of the Astronomical Society of Japan

Tomita, Kenji¹ 

[1] Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-01 E-mail :

关键词: Cosmology;    "Galaxies: clusters of";    "Gravitational lenses";    Quasars;   

DOI  :  10.1093/pasj/48.2.265

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

About33%oftheobservedlensedquasarshaveseparationangleslargerthan3″.Totheoreticallyreproducethisobservationalfact,weinvestigatethestatisticsofquasarlensingduetoclustersofgalaxies,invariouscosmologicalmodelsincludingasuper-horizon-scaleinhomogeneousmodel.BycalculatingtheexpectednumberoflensedquasarsandcomparingitwiththeobservednumberintheHubbleSpaceTelescopesnapshotsurvey,itisfoundthatareasonablenumberoflensedquasarswithsuchlargeseparationanglescanbeobtainedinthecosmological-constant-dominantlow-densitymodelsandthesuper-horizonscaleinhomogeneousmodelswithalow-densityinnerregion.Fromthestandpointoflensstatisticsduetoclustersofgalaxies,itisconcludedthatthesecosmologicalmodelsarebetter,incontrasttothepreviousresultsinthegalacticlensmodels.

【 授权许可】

Unknown