ACKS Seminar: Lam Hui (Columbia University)
Standard Candle, Standard Yardstick and Non-standard Gravity
Feb 14, 2008
from 04:00 PM to 05:00 PM
|Where||CAMPUS: Phys & Astrophys Bldg., 1st fl., conf rm (102/103)|
|Contact Name||Lukasz Stawarz|
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I will discuss four topics: (1) how correlated peculiar flows constitute a surprisingly important source of error for supernova cosmology, (2) how gravitational lensing introduces an observable anisotropy to the galaxy correlation function, and how it impacts baryon acoustic oscillation measurements, (3) how large scale structure data already put interesting constraints on theories of modified gravity, in particular ruling out the popular DGP model at the 3 sigma level, (4) how viable gravity models can be constructed which exhibit a see-saw behavior: a large cosmological constant yielding a small Hubble constant.