天體物理中心報告：Revealing the dark universe with redshift space distortion

Title： Revealing the dark universe with redshift space distortion Speaker：張鵬傑教授 (上海交通大學/上海天文台) Time： 11月15日 10:00AM Venue：理科樓三樓報告廳 Abstract: Peculiar motion of visible tracers of the dark universe, such as galaxies and 21cm emitting gas, induces a characteristic anisotropy in the otherwise isotropic 3D clustering of these tracers. This effect of redshift space distortion provides a promising tool to measure the structure growth rate of the universe and hence to probe dark matter, dark energy and gravity. I will explain the physics of redshift space distortion, review its cosmological applications, and elaborate on challenge and progress in theoretical modeling