ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Eyal Kazin (Swinburne University of Technology)
Title: Improved distance measurements with reconstructed WiggleZ
Date (JST): Thu, May 08, 2014, 13:30 - 15:00
Place: Seminar Room A
Abstract: The baryonic acoustic oscillation imprint in galaxy maps has been shown to be a central tool in constraining cosmology. However, due to the growth of structure, which causes ~5Mpc shifts in galaxy positions, this 150 Mpc feature in the two-point correlation function becomes slightly blurred causing a degradation of its ability to constrain distances. In this talk I present the reconstruction technique which, by restoring information encoded in the matter density field, sharpens this standard ruler, and by so enhances its constraining power. We have recently applied this technique on the galaxy maps of the WiggleZ Dark Energy Survey (0.2<z<1), and find the method successful, significantly improving distance measurements. (OUr results may be found here: