LENSING

作品数：42被引量：15H指数：3
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相关机构：北京大学华东师范大学国家天文台北京师范大学更多>>
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Weak lensing magnification reconstruction with the modified internal linear combination method
《Research in Astronomy and Astrophysics》2021年第10期51-60,共10页Shu-Tong Hou Yu Yu Peng-Jie Zhang 
supported by the National Key Basic Research and Development Program of China(No.2018YFA0404504);the National Natural Science Foundation of China(Grant Nos.11773048,11621303 and 11890691);the science research grants from the China Manned Space Project(No.CMS-CSST-2021B01);the“111”Project of the Ministry of Education(Grant No.B20019)。
Measuring weak lensing cosmic magnification signal is very challenging due to the overwhelming intrinsic clustering in the observed galaxy distribution.In this paper,we modify the Internal Linear Combination(ILC)metho...
关键词：cosmology:observations large-scale structure of universe weak lensing 
Search for strong galaxy-galaxy lensing in SDSS-Ⅲ BOSS被引量：1
《Research in Astronomy and Astrophysics》2020年第1期6-18,共13页Xin-Lun Cheng 
partly supported by the National Key Basic Research and Development Program of China(No.2018YFA0404501 to SM);the National Natural Science Foundation of China(Grant Nos.11821303 and 11761131004 to SM)
Strong lensing is one of the most spectacular views in the universe.Many cosmological applications have been proposed,but the number of such lensing systems is still limited.In this work,we applied an improved version...
关键词：gravitational lensing:strong techniques:spectroscopic methods:data analysis 
Comparison of halo detection from noisy weak lensing convergence maps with Gaussian smoothing and MRLens treatment
《Research in Astronomy and Astrophysics》2011年第5期507-523,共17页Yang-XiuJiaoj Huan-YuanShan Zu-HuiFan 
supported in part by the National Natural Science Foundation of China (Grant Nos. 10373001,10533010 and 10773001);the National Basic Research Program of China (973 program,No. 2007CB815401);Huan-Yuan Shan is very grateful for the hospitality of CPPM
Taking into account the noise from intrinsic ellipticities of source galaxies, we study the efficiency and completeness of halo detections from weak lensing convergence maps. Particularly, with numerical simulations, ...
关键词：cosmology： theory-gravitation-dark matter-gravitational lensing 
Contradiction between strong lensing statistics and a feedback solution to the cusp/core problem被引量：1
《Research in Astronomy and Astrophysics》2010年第12期1215-1222,共8页Stacy McGaugh 
supported by the National Natural Science Foundation of China (Grant 11073023);the National Basic Research Program of China (973 Program;Grant 2009CB24901);the National Science Foundation of the United States (Grant AST0908370)
Standard cosmology has many successes on large scales, but faces some fundamental difficulties on small, galactic scales. One such difficulty is the cusp/core problem. High resolution observations of the rotation curv...
关键词：cosmology： theory -- dark matter -- galaxies： halos -- gravitationallensing： strong 
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