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国家自然科学基金(11103032)

作品数:2 被引量:1H指数:1
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Lensing clusters of galaxies in the SDSS-Ⅲ被引量:1
2011年
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 giant arcs in addition to 30 known lensing systems. Among 68 cases, 13 clusters are "almost certain" lensing systems with tangential giant arcs, 22 clusters are "probable" and 31 clusters are "pos- sible" lensing systems. We also find two exotic systems with blue rings. The giant arcs have angular separations of 2.0jj - 25.7j~ from the bright central galaxies. We note that the rich clusters are more likely to be lensing systems and the separations between the arcs and the central galaxies increase with cluster richness.
Zhong-Lue Wen Jin-Lin Han Yun-Ying Jiang
关键词:GALAXIESCLUSTERS
An efficient method to identify galaxy clusters by using SuperCOSMOS,2MASS and WISE data
2014年
The survey data of Wide-field Infrared Survey Explorer(WISE)provide an opportunity for the identification of galaxy clusters.We present an efficient method for detecting galaxy clusters by combining the WISE data with SuperCOSMOS and 2MASS data.After performing star-galaxy separation,we calculate the number of companion galaxies around the galaxies with photometric redshifts previously estimated by the SuperCOSMOS,2MASS and WISE data.A scaled richness Rscal 30 is set as a criterion to identify clusters.From a sky area of 275 deg2of the Sloan Digital Sky Survey Stripe 82 region,we identify 302 clusters in the redshift range of 0.1
XU WeiWeiWEN ZhongLueHAN JinLin
关键词:INFRAREDREDSHIFTS
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