报告题目: |
Constraining structure of dark matter haloes with galaxy-galaxy lensing |
报告人: |
李然 |
|
国家天文台
|
报告时间: |
2013-10-17 13:30 |
报告地点: |
物理系三楼报告厅 |
主办单位: |
物理系 |
简介: |
Abstract: Gravitational lensing observations, which measure the image distortions of
background galaxies caused by the gravitational field of the matter distribution
in the foreground, provide a promising tool to probe the dark matter
distribution directly. In particular, galaxy-galaxy weak lensing, which focuses
on the image distortions around lensing galaxies, can be used to probe the
distribution of dark matter around galaxies, hence their dark matter haloes. The
galaxy-galaxy lensing signal produced by individual galaxies is usually very
weak, and so one has to stack the signal from many lens galaxies to have a
statistical measurement. In our work, we investigated the potential of
galaxy-galaxy lensing in measuring dark matter haloes structures and
substructures. |
|
