Intrinsic ellipticity correlation of luminous red galaxies and misalignment with their host dark matter halos. The 8 th Sino – German workshop Teppei O KUMURA (SHAO) Collaborators: Yipeng Jing (SHAO) & Cheng Li (MPA). References:.
The 8th Sino – German workshop
Teppei OKUMURA (SHAO)
Collaborators: Yipeng Jing (SHAO) & Cheng Li (MPA)
Okumura, Jing, & Li, ApJ, 694, in press (arXiv:0809.3790) Okumura & Jing, ApJL, accepted (arXiv:0812.2935)
Tidal field, … galaxies and misalignment with their host dark matter halosIntroduction
= 0 : line = 1 : spherical
q = a / b
Halo occupation distribution for LRGs (Seo+2008, Zheng+) although the error bars are large.
Jing & Suto (2000)
4 times smaller
Calculation of model c11(r ;σθ) for LRGs
Δc11(r ;σθ) = c11model(r ;σθ) – c11obs(r)
Observation although the error bars are large.
σθ = 0 model
σθ = 35 modelConstraints on misalignment
Dependence of II correlation on halo mass (Jing 2002)
Hirata & Seljak (2004), Pengjie’s talk although the error bars are large.
Distant source (G)
Nearby source (I)
GI termsAnother contamination; Gravitational shear – intrinsic ellipticity correlation
Directly related to the GI term of the shear power spectrum.
This relation is indeed valid on large scales.
Galaxy biasing ~2 for LRGs
between q and β, we expect