ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Donghui Jeong (JHU)
Title: New ways of searching for the primordial gravitational wave from large scale structure
Date (JST): Fri, Jun 29, 2012, 16:00 - 17:00
Place: Seminar Room A
Related File: 720.pdf
Abstract: Primordial gravitational wave (PGW) is a valuable probe of the physics of the early universe as the amplitude of it is directly related to the energy scale of inflation. Most popular method of detecting PGW is using a parity odd (B-mode) polarization pattern of the cosmic microwave background radiation. Then, what about the large scale structure?

In this talk, we shall discuss two possible ways that PGW affects the large scale structure: 1) through light deflection and 2) through intrinsic correlation. We shall show that one can probe above two effects from the B-mode of weak gravitational lensing and the off-diagonal correlation of galaxies. For both cases, the intrinsic correlation dominates over the light deflection in standard cosmologies as PGW amplitude decays once the mode comes inside of the horizon.
Remarks: Reference:
Jeong & Kamionkowski [arXiv:1203.0302]
Schmidt & Jeong [arXiv:1204.3625]
Jeong & Schmidt [arXiv:1205.1512]
Schmidt & Jeong [arXiv:1205.1514]