文章基本信息

标题：The effects of varying depth in cosmic shear surveys
本地全文：下载
作者：Sven Heydenreich ; Peter Schneider ; Hendrik Hildebrandt 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2020
卷号：634
页码：1-16
DOI：10.1051/0004-6361/201936966
语种：English
出版社：EDP Sciences
摘要：We present a semi-analytic model for the shear two-point correlation function of a cosmic shear survey with non-uniform depth. Ground-based surveys are subject to depth variations that primarily arise through varying atmospheric conditions. For a survey like the Kilo-Degree Survey (KiDS), we find that the measured depth variation increases the amplitude of the observed shear correlation function at the level of a few percent out to degree-scales, relative to the assumed uniform-depth case. The impact on the inferred cosmological parameters is shown to be insignificant for a KiDS-like survey. For next-generation cosmic shear experiments, however, we conclude that variable depth should be accounted for.
关键词：engravitational lensing: weakcosmology: miscellaneous