{"title":"Weak Gravitational Lensing","authors":"D. Gruen, B. Jain, M. Troxel","doi":"10.1142/9781786348364_0012","DOIUrl":null,"url":null,"abstract":"1 • Foreground Masses Can Magnify and Distort Background Sources • Faint, High-z Galaxies Provide a “Cosmic Wallpaper” Upon Which the Lensing Mass is Projected – At even modest redshifts there are ~ 50 galaxies/arcmin2. The deepest surveys with HST reveal ~ 100/arcmin2. • Source Sizes Are Unknown but We can Compute an Average Shape for Un-lensed Field Samples and Assume Random Orientations • For Simplicity Let’s Assume Average Shape is Circular with Radius q. For a Weakly Lensed Background Source:","PeriodicalId":319407,"journal":{"name":"The Dark Energy Survey","volume":"99 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Dark Energy Survey","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1142/9781786348364_0012","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
1 • Foreground Masses Can Magnify and Distort Background Sources • Faint, High-z Galaxies Provide a “Cosmic Wallpaper” Upon Which the Lensing Mass is Projected – At even modest redshifts there are ~ 50 galaxies/arcmin2. The deepest surveys with HST reveal ~ 100/arcmin2. • Source Sizes Are Unknown but We can Compute an Average Shape for Un-lensed Field Samples and Assume Random Orientations • For Simplicity Let’s Assume Average Shape is Circular with Radius q. For a Weakly Lensed Background Source:
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