题  目：Constraint of halo properties using weak lensing flexion

报告人：尔欣中 博士(中国科学院国家天文台)

摘  要：Gravitational lensing is one of the powerful tool in cosmology. It can probe the dark matter distribution without assume the nature or state of the matter. Flexion is the higher order effects in weak lensing. Flexion is very sensitive to small-scale mass variations, and thus can be use to estimate the halo properties, especially the halo ellipticity. Moreover, we can also combine the weak lensing shear and flexion to improve the estimation of halo properties.

时  间：2012年3月31日（星期六）下午14:30

地  点：（北京西路2号）紫台大楼317会议室

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