LENSING

作品数：43被引量：15H指数：3
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Understanding the Predication Mechanism of Deep Learning through Error Propagation among Parameters in Strong Lensing Case
《Research in Astronomy and Astrophysics》2023年第12期252-262,共11页Xilong Fan Peizheng Wang Jin Li Nan Yang 
supported by the National Natural Science Foundation of China(grant No.11922303);the Natural Science Foundation of Chongqing(grant No.CSTB2023NSCQ-MSX0103);the Key Research Program of Xingtai 2020ZC005;the Fundamental Research Funds for the Central Universities(grant No.2042022kf1182)。
The error propagation among estimated parameters reflects the correlation among the parameters.We study the capability of machine learning of"learning"the correlation of estimated parameters.We show that machine learn...
关键词：gravitational lensing strong-methods data analysis-Galaxy fundamental parameters 
The Chromatic Point-spread Function of Weak Lensing Measurement in the Chinese Space Station Survey Telescope
《Research in Astronomy and Astrophysics》2023年第7期263-276,共14页Quanyu Liu Xinzhong Er Chengliang Wei Dezi Liu Guoliang Li Zuhui Fan Xiaobo Li Zhang Ban Dan Yue 
funded by the National Natural Science Foundation of China(NSFC)under Nos.11873006,11933002,11903082,and U1931210;the science research grants from the China Manned Space Project with Nos.CMS-CSST-2021-A01,CMS-CSST-2021A12,and CMS-CSST-2021-A07。
Weak gravitational lensing is a powerful tool in modern cosmology.To accurately measure the weak lensing signal,one has to control the systematic bias on a small level.One of the most difficult problems is how to corr...
关键词：gravitational lensing:weak cosmology:observations astronomical instrumentation methods and techniques 
The Multiple Images of the Plasma Lensing FRB
《Research in Astronomy and Astrophysics》2022年第6期190-203,共14页Yu-Bin Wang Zhi-Gang Wen Rai Yuen Na Wang Jian-Ping Yuan Xia Zhou 
supported by the National Natural Science Foundation of China(grant Nos.12041304,11873080 and 12033001);supported by the 2021 project Xinjiang Uygur Autonomous Region of China for Tianshan elites,and the National SKA Program of China(grant Nos.U1838109,2020SKA0120100 and 12041301);supported by the Key Laboratory of Xinjiang Uygur Autonomous Region No.2020D04049;the National SKA Program of China No.2020SKA0120200;the 2018 Project of Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents;supported by CAS“Light of West China”Program No.2018-XBQNXZ-B-025;partly supported by the Operation,Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments,budgeted from the Ministry of Finance of China(MOF)and administrated by the CAS。
We investigate the formation of multiple images as the radio signals from fast radio bursts(FRBs)pass through the plane of a plasma clump.The exponential model for the plasma clump is adopted to analyze the properties...
关键词：GALAXIES distances and redshifts GALAXIES ISM gravitational lensing:strong-ISM structure-scattering 
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 
Lensing clusters of galaxies in the SDSS-Ⅲ被引量：1
《Research in Astronomy and Astrophysics》2011年第10期1185-1198,共14页Zhong-Lue Wen Jin-Lin Han Yun-Ying Jiang 
Supported by the National Natural Science Foundation of China(Grant Nos. 10821061, 10833003 and 11103032);Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences and the National Key Basic Research Science Foundation of China (2007CB815403);Funding for SDSS-III has been provided by the Alfred P.Sloan Foundation,the Participating Institutions,the National Science Foundation and the U.S.Department of Energy
We identify new strong lensing clusters of galaxies from the Sloan Digital Sky Survey Ⅲ （SDSS DR8） by visually inspecting color images of a large sample of clusters of galaxies. We find 68 new clusters showing gian...
关键词：GALAXIES CLUSTERS general -- gravitational lensing 
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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